Malicious PDF — malware analysis report

Static analysis result for SHA-256 e751b1e8307029b6…

MALICIOUS

PDF

88.8 KB Created: 2021-03-15 15:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 36a0aed13ca346858ef782624e19b0c4 SHA-1: df94d067e2c8b26aae2cd140bcfa7bc6d3317fa8 SHA-256: e751b1e8307029b6d7bfacb04ef04e2e99646c944ca440741bbcf40a7cd16cad
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a URL referencing 'bts fake love piano sheet pdf' indicates a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://mezovuduw.ru/award?keyword=bts+fake+love+piano+sheet+pdf PDF link annotation
    • https://cdn.sqhk.co/pimabosi/cihjj0k/xavufebuperisat.pdfIn PDF document text
    • https://kagukemo.weebly.com/uploads/1/3/4/8/134884413/1967661.pdfIn PDF document text
    • http://ledy66.net/36698377125txk8r.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/fujitsu_scansnap_s1300i_wired_usb_document_scanner.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/ehbZC5A/past_participle_and_future_tenses.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/dujutelamewinurenodavawa.pdfIn PDF document text
    • https://pegojuzifaxoda.weebly.com/uploads/1/3/5/3/135309499/2711268.pdfIn PDF document text
    • http://msertis.xyz/if_im_black_what_is_my_ethnicity4zfss.pdfIn PDF document text
    • http://runolive.com/fernando_pessoaz7cg7.pdfIn PDF document text
    • https://cdn.sqhk.co/zubixola/mSdhaic/83505314028.pdfIn PDF document text
    • https://cdn.sqhk.co/danopefasuf/N0gfjid/nugojupivudubabapuno.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/how_to_learn_php_for_beginners.pdfIn PDF document text
    • https://xogovowumo.weebly.com/uploads/1/3/0/7/130738979/topixexoku.pdfIn PDF document text
    • https://cdn.sqhk.co/mibaforetu/Jieidhh/wufige.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/45777341645.pdfIn PDF document text
    • https://lojumokixawivi.weebly.com/uploads/1/3/4/3/134370302/3841257.pdfIn PDF document text
    • https://zikowajemaje.weebly.com/uploads/1/3/1/6/131607239/68caeceb4684f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_3af25ecdaecc40e6893e821892c3e9a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/960f5ac3-9673-4b8a-8ea3-bab4ceebedfe/jisajujosimitegepumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c823df7-e827-4017-9472-f59402b9de0a/47271747978.pdfIn PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_9ba0b2ab92c548e3a8960968f9d41568.pdf?index=trueIn PDF document text
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_c8ebf4260b2f4bcaaf042e21187cd9ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e123655-8939-4981-bc31-77a97b0105a3/best_grammar_book_for_english.pdfIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_070325ccada740da88122318873d98e8.pdf?index=trueIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_8ecececc38e942b4bc0ddcfa3c852929.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 3776 bytes
SHA-256: 95701478be8c03d22a718e362b78749c9d002fdd3e142f037a81021cebd43efa
font_01_sfnt_off00010445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10445 5204 bytes
SHA-256: 3dc8aa4f70bfd6ff1074d8c09a46434e4a8eab3af6ef08e0f2b28b3f97ddc08d
font_02_sfnt_off0001160b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160B 11704 bytes
SHA-256: 0c3ac9cc37f5b5912867fab2a2a10998209109df4467f3aa33014fb00d338162
font_03_sfnt_off00013e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E69 16080 bytes
SHA-256: 705cd36d9c2227ee052114be9604a9bf84eb8c2476a52f9da8c5a7759dbb33cb

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