Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e072b778146de89…

MALICIOUS

PDF

95.0 KB Created: 2021-03-16 22:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1a2efb0072bdfaa1c6c817631e5e1f68 SHA-1: a212880944ee9b980781def89ff106fbe23f8f6a SHA-256: 5e072b778146de8912349020bdb79e00645d99902b043988048dfb7942fde4bc
304 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to disposable hosting and a link farm, indicating a phishing or SEO manipulation scheme. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' specifically flags Facebook impersonation and the use of a redirector, suggesting an attempt to phish credentials. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/mavetazotitan.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/award?keyword=attachment+styles+in+adults+pdf In PDF document text
    • https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/mavetazotitan.pdfIn PDF document text
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/xoxaburapugabonim.pdfIn PDF document text
    • https://kopepadozuko.weebly.com/uploads/1/3/4/5/134505487/d79f24c8b9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406213/normal_5fca946bb7b30.pdfIn PDF document text
    • https://xubusiruk.weebly.com/uploads/1/3/4/4/134481781/wipaxa.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/fd5d997addc.pdfIn PDF document text
    • http://momarivido.mypressonline.com/final_cut_pro_x_free_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459323/normal_602ebfb5c41bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408176/normal_5fff2df36b891.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/wipirinabuwam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410989/normal_5ff29f0e55475.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/lebinore_lanajijewazo.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/nikon_coolpix_p610_price_in_bangladesh.pdfIn PDF document text
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/c45f6126498b.pdfIn PDF document text
    • https://bamewubi.weebly.com/uploads/1/3/2/3/132303354/9277724.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/wikapula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420029/normal_600d1ff3b9db8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xemunebo.atwebpages.com/famazozoxadu.pdfIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_03d828db1b4c4ca18465efa42dbb1876.pdf?index=trueIn PDF document text
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_9d59b7f2810748a583af0ede2ba0fb04.pdf?index=trueIn PDF document text
    • http://taroveruwidiba.onlinewebshop.net/78878813170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3098e82-98ce-48ad-b451-435561a52ef4/71015936742.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_95ccb081d9f44386a59ad6e733ce4f67.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91da9654-6ef1-41ed-9b93-2fa17d45dd5b/machine_tool_practices_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/128aaf9c-ac69-4fb0-a4d2-43605436885c/vivevetodulipikax.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_eb7b8678f0094e4c9a7b998e9b5d67af.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_14b763dcb2ed4ca7b8e14ae5298c1608.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001293e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293E 5164 bytes
SHA-256: d2ec5b419e041f2486cc79a207788c0410e7b9e5740e1ea5080ab0b1a0e61fbb
font_01_sfnt_off00013aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAC 11064 bytes
SHA-256: 1b5d043204f77f00bc9d0611929d9a593df0ff5a12f38566baf3ad3519227fbd
font_02_sfnt_off00016029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16029 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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