Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f590f09433365f4…

MALICIOUS

PDF

114.9 KB Created: 2021-05-12 01:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4510991aa34a2c4aa2cf613746a3d3a8 SHA-1: d36f1976721739fc2e1ef49507a688c14d75bfae SHA-256: 7f590f09433365f4ef783c723e956649d4e74098b3d16b875fad6718a1092e12
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous external URLs, including one pointing to `https://maypoin.ru/strik?utm_term=ab+doer+twist+manual`, suggesting a lure to a malicious site. The presence of a 'Remote-support tool lure' heuristic indicates the document likely attempts to trick the user into installing or connecting to remote access software, a common tactic in social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=ab+doer+twist+manual PDF link annotation
    • http://linawoninup.22web.org/survival_food_companies_in_utah.pdfIn PDF document text
    • http://menajaf.iblogger.org/nidizelojokutotijozodol.pdfIn PDF document text
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/6579404.pdfIn PDF document text
    • https://domisupufiz.weebly.com/uploads/1/3/5/3/135316273/zedupewiwa.pdfIn PDF document text
    • https://faporipito.weebly.com/uploads/1/3/4/6/134600592/woruvikom_pebijipasov_jenegelolupa.pdfIn PDF document text
    • https://lidoxuma.weebly.com/uploads/1/3/4/5/134584164/bopusoposimo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412181/normal_6002c0ecbaee3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_600df82aea302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450641/normal_601d7e0baf6ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_6028b2755a40d.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://uploads.strikinglycdn.com/files/8c3407f1-18e4-435e-9e9b-dc75f9fd1b33/why_do_i_keep_burping_acid_reflux.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_b023f401c7364eb1afe267aa66b0af48.pdf?index=trueIn PDF document text
    • http://benogelepawes.rf.gd/aeon_s_end_war_eternal.pdfIn PDF document text
    • http://dezinolabebosod.atwebpages.com/dimizelererimojegop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc06a3f2-dd3a-4f22-a649-6b5932f8a6e5/eoc_algebra_2_practice_test.pdfIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_a6cad02eda094026bd1be49c2595948b.pdf?index=trueIn PDF document text
    • http://befatig.epizy.com/78402389199.pdfIn PDF document text
    • http://gejizejaniwijef.atwebpages.com/47645261621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fdbfeaa-0634-4368-98ec-193a70580512/samsung_un24h4000af_firmware_update.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
    • 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_off00014e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8E 2880 bytes
SHA-256: 80960c5ef920dc812f40421d0c41ad5272b60f71c1256c1bdf7a11afd8d5b2df
font_01_sfnt_off000158cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158CB 5072 bytes
SHA-256: 3eb390a9a55ccfffcec4e11a4e3cf12c4ec746d361f15641c85fe44ad0e06eac
font_02_sfnt_off000169f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169F5 14640 bytes
SHA-256: 659f55fceb831fbd2b050d4e39c46684875c91f9e75603eb49d835fa7c29973a
font_03_sfnt_off0001996e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1996E 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e
font_04_sfnt_off0001ae36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE36 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3