Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a6ce62bf02ad23a…

MALICIOUS

PDF

76.6 KB Created: 2021-04-03 22:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d054fb711ba825486e87b36162c66ede SHA-1: ebe832b1dff2361d490b39a72ac574f5accfcb91 SHA-256: 6a6ce62bf02ad23a78d0660bbfce188120ba0cb0c9a18e23f37a8aa1f18ef50c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. One prominent URL, https://kuzutuzo.ru/wix?keyword=scion+xb+owners+manual+2012, is presented as a search result for a vehicle manual, likely a lure. ClamAV detection and ML classification strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. No scripts were extracted, but the PDF structure itself is indicative of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=scion+xb+owners+manual+2012
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bezegoluzose/how_to_rekey_schlage_deadbolt_lock.pdf
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_54d867b28b0d41f38f337c095d13f37f.pdf?index=true
    • https://s3.amazonaws.com/sukobogixe/49864853558.pdf
    • https://s3.amazonaws.com/dovulavavo/polygon_interior_angles_sum_worksheet.pdf
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_acc26441910c404eb2d139ab2d459b21.pdf?index=true
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_b0471f13af5548c4b1dd63d9cfd44d6a.pdf?index=true
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_c86e822635af411cb394cc6fe8ff3875.pdf?index=true
    • https://s3.amazonaws.com/dazuxujepov/matematica_financiera_que_es_valor_actual.pdf
    • https://s3.amazonaws.com/peveziwoguxuzam/albuterol_ipratropium_davis.pdf
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_5eef7a33fc5c47bcbf5dbeedc524045d.pdf?index=true
    • https://s3.amazonaws.com/ritoma/wifunedezinekalerujo.pdf
    • https://s3.amazonaws.com/nigimul/71627637020.pdf
    • https://s3.amazonaws.com/wujafivabipo/autoimmune_hepatitis_bsg_guidelines.pdf
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_dede91f9bf1440149aee478884ae89ca.pdf?index=true
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_75f57913b1f24f1abce241dd19a7fd3c.pdf?index=true
    • https://s3.amazonaws.com/suxugipipolazog/iphone_caller_id_apk.pdf
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_c464eae911eb4e159dfdbed462bce7f8.pdf?index=true
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_adc10b459d694e748b81535d0ad38419.pdf?index=true
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_84a07a31bc4c47ac979b550fc6acd36d.pdf?index=true
    • https://s3.amazonaws.com/mejawiwomak/diabetes_diet_guidelines.pdf
    • https://s3.amazonaws.com/dazinibonofobi/ad_blocker_pro_apk_onhax.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de74.bin
5b4340e58680995a944a77668e879087c63d4c2b943cefc4e27dc9d5feb2042e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE74 5476 bytes
font_01_sfnt_off0000f0f4.bin
30b861e9a2aa8e7455a5cf85c4d65e9005657fbcb97c4449097a810b68192ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 10648 bytes
font_02_sfnt_off0001152e.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1152E 4324 bytes

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