Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3c29e73f4f797f…

MALICIOUS

PDF

91.5 KB Created: 2021-05-01 21:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4eb0ac3b61349067e8c7d363b8a2e2f2 SHA-1: 5cd3db18ad84ca73f6b5a88ee720982ae9566c1c SHA-256: 1e3c29e73f4f797f032560f320fb8e7e5c6d456711188431492c16fbfed85ff6
206 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, characteristic of SEO spam or phishing campaigns. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pelibifir.ru/strik?utm_term=ion+block+rocker+speaker+specs PDF link annotation
    • http://dayzcommunity.info/zodopafisedesebowecb3lw.pdfIn PDF document text
    • http://sfr-espace.best/21668211283x0fem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492593/normal_6068c086d3222.pdfIn PDF document text
    • http://exampl1214.com/what_ink_does_hp_photosmart_c4680_use424ge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445325/normal_6023562f90ba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_60674950dcc62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_6066e546d8907.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://suvowafavij.epizy.com/agronomy_manual.pdfIn PDF document text
    • http://pitodisile.epizy.com/35920386821.pdfIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_4ead294a688d49be954884ee23c4ee90.pdf?index=trueIn PDF document text
    • https://467375c7-a7a6-4806-a9b7-892c2a528f89.filesusr.com/ugd/911174_86f03895faa94704b93001adbbdaf4ae.pdf?index=trueIn PDF document text
    • https://9ffa65b4-b95e-481c-977d-2cf6acaa57d7.filesusr.com/ugd/f68d46_61d7af8c713541ec946d914acf01068f.pdf?index=trueIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_f9585895902243b0b560b15fc8dac129.pdf?index=trueIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_737fa19c7550448390e46d1b327c730a.pdf?index=trueIn PDF document text
    • http://dipodowimovaxi.epizy.com/xunomuserusinusez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e10506-cdac-4c01-98a7-b9ad5b9cf600/64713915604.pdfIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_6a73199e9be44e9da20b67c04941f6d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9983c2d7-7e1c-4a80-b10e-9a1338289d47/how_to_ask_someone_to_give_you_a_letter_of_recommendation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c778fc41-0a86-419c-837e-ee1a396f0671/26232753038.pdfIn PDF document text
    • http://fubimilimavun.epizy.com/53867825981.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_01e3023680884a7d9e9c984f59325a2a.pdf?index=trueIn PDF document text
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_2bb4d58e17654d5f81dd36eb798536d5.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 4728 bytes
SHA-256: 3332587cdcfdc1129e57dca207483d233ef853341249753b9bb5b96b21a871e7
font_01_sfnt_off00010942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 3852 bytes
SHA-256: 541b7c978f05254e900d69222433227c6c600d7c22859b8f4eee4f3419f31e7b
font_02_sfnt_off0001153f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153F 11448 bytes
SHA-256: 8c37a0982a2ed3d9d06389de1024ff7f0021e0cbc411ac953aceb1aa23915047
font_03_sfnt_off00013c2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2C 16164 bytes
SHA-256: 45cbdee8d0e9683c34ea7758bf990cbd3650d80547672a96691f419f916de5fb
font_04_sfnt_off00015143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15143 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c