Malicious PDF — malware analysis report

Static analysis result for SHA-256 977d4183d2ba4ea5…

MALICIOUS

PDF

84.2 KB Created: 2021-04-26 15:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: be193d9a63d785cf8e4c22f2ef89905f SHA-1: d8ebd26515f1340a836c5a35ae83218a96277f22 SHA-256: 977d4183d2ba4ea5e16c6e6bdd5d8dfb5bd1832bf5a79f8363139a3ed9aa409e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous external links, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware distribution sites. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://maypoin.ru/strik?utm_term=char+broil+big+easy+grill+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475383/normal_5fd0827f5ee49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419642/normal_5fff3f7d97b4d.pdfIn PDF document text
    • http://xixofafil.medianewsonline.com/pitikoruvofadifisodetefag.pdfIn PDF document text
    • http://wudazex.sportsontheweb.net/makalah_daun_binahong.pdfIn PDF document text
    • http://mavogevuz.getenjoyment.net/75678864605.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/neveguvewixidubesij.pdfIn PDF document text
    • http://togaxifobuf.mypressonline.com/marcelino_pan_y_vino_book.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/pogapurorotabawupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454679/normal_60162898345b0.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/nike_resistance_band_training_exercises.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381962/normal_5ff43439af092.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/mcdougal_littell_algebra_2_practice_workbook_answers.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/61045564902.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
    • https://6731adf0-0bfb-4e29-9024-dbf0b6c78d19.filesusr.com/ugd/163ed7_d6794084444143eaa708f781a85c8b9b.pdf?index=trueIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_b31119df1f694d2d90e6f090cdab58ca.pdf?index=trueIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_6aa1e947b3cc49728e5854a54c68cecb.pdf?index=trueIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_6773a49c916d41afa771606c3e144951.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2db9a03-8216-49ed-a102-23ec191a8de5/kenuvowuxej.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_11ed3c123b0c4ed284de8c7b98282779.pdf?index=trueIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_04b20f2bf1864b7686c71911ce04d2a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/166a378e-d274-4076-ace2-26cb50419f38/15320819891.pdfIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_eb000a8318de472cba44e483a701af61.pdf?index=trueIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_66227c64d7ef4092866768d186544d36.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7061cea9-8bb8-42da-9ce1-12d4d1137303/68052851417.pdfIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_47ce4a70cec749a29339494e8dbebc98.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abb382b-fa46-40a9-b562-4de9d55196ab/how_to_install_wii_system_menu_on_dolphin.pdfIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5E 5028 bytes
SHA-256: 277383307b4ebe0b7284cd54ce51048d49d661be5eea30aa6518158a6b8b4b7d
font_01_sfnt_off00010f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F97 10904 bytes
SHA-256: 4bbdafcfd7e0e3599446b58ac8e5f7e9254cb0198ae79bbdf213a653037d965e
font_02_sfnt_off000134c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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