Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdc2cd099a77ce7…

MALICIOUS

PDF

80.7 KB Created: 2021-04-01 19:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ffc64e48beac880e39975e8823598c46 SHA-1: 047bdf97470369cc367ba54e5c35c59c48e4723c SHA-256: ebdc2cd099a77ce7bb4b38b3f6aec450a95baa14c10b3f998c4701e8b62243c0
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors or disposable hosting, indicating a phishing or scam attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=the+testaments+pdf+free In PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/buvebojovibubodoviki.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/najubutunubu.pdfIn PDF document text
    • http://doridusa.medianewsonline.com/20327913927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_60187cc4223e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_602452e1518eb.pdfIn PDF document text
    • https://mijevofere.weebly.com/uploads/1/3/1/6/131606011/6b2f60.pdfIn PDF document text
    • http://nexipufogavajid.getenjoyment.net/twilight_graphic_novel_volume_1_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413126/normal_5fe3ee68319f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496616/normal_6065cc74cd4b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501501/normal_6043ef107302f.pdfIn PDF document text
    • http://maxoranano.sportsontheweb.net/72817313067.pdfIn PDF document text
    • http://wizapivizesib.mygamesonline.org/kebafudoxamuk.pdfIn PDF document text
    • https://sefokuto.weebly.com/uploads/1/3/0/7/130738721/faroxizote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_16df04d34cb4407aba3f7b64d3775375.pdf?index=trueIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_64434a2864444d3c80958e1e787279b2.pdf?index=trueIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_8a84cc63dfd54e9fab6924762fe214a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/96467002966.pdfIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_c4cbd1cdda0a47f1bcd73039ecc33735.pdf?index=trueIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_11052c76379b4f9fbbacc96b3761713f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ragejufa/mivujiwolifuwirudifoma.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/giwimulowaxenojono.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/krk_rokit_5_g4_weight.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_4feeac7381144b2789e9f16e37caf951.pdf?index=trueIn PDF document text
    • https://ebbb41b5-b8b7-4bfc-9e1b-23e79ad93844.filesusr.com/ugd/5eba67_775c526f1964477b92112c2571314089.pdf?index=trueIn PDF document text
    • https://299bc67c-4c9a-44ea-852c-18f2d39dca40.filesusr.com/ugd/954c8b_8ff9e2622ccc4c95a3ec1b50ee102651.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0E 5200 bytes
SHA-256: 10cd266a1de5e07a4e4be3bac9be21cdf303b6afeae4db3ca214a93cfc6131db
font_01_sfnt_off00010d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D91 11156 bytes
SHA-256: ebc4c44ae41697aa5670235748ed62cd57c35218e31fac44771a0885fd6c05e8