Malicious PDF — malware analysis report

Static analysis result for SHA-256 29942edb51ac0cd3…

MALICIOUS

PDF

90.2 KB Created: 2021-04-06 02:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 49070bd6cf4019f4dfdc431e739d0611 SHA-1: eb9a19e2da4d96d8d920d9648bb8eda0fe486b92 SHA-256: 29942edb51ac0cd3f361b9977db5f0656a469dbd434196f2f808cbf04e1d8ef0
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to link farms designed to redirect users to malicious sites, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the primary attack pattern involves redirecting users through a network of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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=bullous+pemphigoid+pdf In PDF document text
    • https://tekolukab.weebly.com/uploads/1/3/4/8/134853049/zujotodurupepow-gizejunizutelav.pdfIn PDF document text
    • https://pogefaduvo.weebly.com/uploads/1/3/5/3/135391099/jumajexufodobo_medovilipodog.pdfIn PDF document text
    • https://puzemebakojufem.weebly.com/uploads/1/3/4/2/134234574/mitad-lobofedo-ravigimusap-fojafenuwu.pdfIn PDF document text
    • http://nijikelax.22web.org/god_of_war_ascension_titan_game.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/2218166.pdfIn PDF document text
    • https://toxosujaduwo.weebly.com/uploads/1/3/0/8/130874389/4668605.pdfIn PDF document text
    • https://rodubimalutavos.weebly.com/uploads/1/3/2/6/132695690/4001448407a4a1.pdfIn PDF document text
    • https://raxuremaxu.weebly.com/uploads/1/3/5/3/135350699/sagud.pdfIn PDF document text
    • https://pirodiditabun.weebly.com/uploads/1/3/0/9/130969169/a56c4029fdbbc.pdfIn PDF document text
    • https://felilediwifagid.weebly.com/uploads/1/3/1/4/131453780/ketewaziniwusa.pdfIn PDF document text
    • https://fugakesuj.weebly.com/uploads/1/3/0/7/130776648/0121a114a3f.pdfIn PDF document text
    • https://nomozusosowewox.weebly.com/uploads/1/3/1/4/131453154/70434677e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vusolitadiro.rf.gd/chemistry_practical_book_class_12_download.pdfIn PDF document text
    • http://zaxukesaludu.epizy.com/wide_range_achievement_test_4_professional_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/40960380569.pdfIn PDF document text
    • http://niselekotoz.myartsonline.com/brighter_than_the_sun_maya_banks.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/autonics_push_button.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/rexetesopeworixefo.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/amazon_echo_dot_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/sequence_number_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/59177247010.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12227 5200 bytes
SHA-256: fc0dd71949ab8afcd62db2083000330da571787e083eceaa74c0efbed2ea6ffc
font_01_sfnt_off000133be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BE 11812 bytes
SHA-256: 35519691f8ef4429db7d684bf8031f496e0802c9b1b9067396531abfafc0dd3e

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