Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76a9bf5048d6348…

MALICIOUS

PDF

95.1 KB Created: 2021-05-18 03:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e5960470e21f4c68be80cee244882402 SHA-1: 28c6bf74d52bb8be4e4b4b9a056457a79e36b096 SHA-256: a76a9bf5048d634815d54158d6fd0c0d9176943c8d28ee15263e84bc7088517f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary malicious URL, 'https://dugedepap.ru/strik', is likely intended to deliver a secondary payload. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam pretext, further supported by the document's attempt to appear as an answer key for bookkeeping assessments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://dugedepap.ru/strik?utm_term=osborne+books+tutor+zone+advanced+bookkeeping+practice+assessment+2+answers PDF link annotation
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/tiveliwemoserora.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/a6c6a20f21b.pdfIn PDF document text
    • https://digavonuvuveg.weebly.com/uploads/1/3/4/8/134851043/a4fdbce86d94.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/85ca812e99de2.pdfIn PDF document text
    • https://pibitodasako.weebly.com/uploads/1/3/0/9/130969140/sidexede.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/libosokune/zawewigasuxilig.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/akkada_abbai_ikkada_ammayi_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/axial_scx10_hard_body_mounts.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/53311937103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c868cc2-e426-4d54-b923-16a65f58e345/lijudabiwutinegejuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b557de4-fe25-4c34-9d25-16a17588ca06/krups_type_964_espresso_maker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/xizosujivaluluxuwib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebff0195-eb60-4547-9510-26700ee4d3ac/65604357212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/031e68c8-822a-4612-9479-073659c830b1/zinexedomovak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0566bc5f-c730-41b5-8596-1cfb90f1932b/govawonenonogusinuwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/decorators_dust_sheets_b_and_q.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52190b2c-4c92-44e0-a601-343ac9ad5604/piwijulik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6462f8c7-226b-464c-b4a6-a1d2a40e1372/c_programming_language_in_hindi_wikipedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c838590a-faa1-4620-b23f-5d6f861390e9/kerimevusuxir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6cc79cf-f3be-45d7-bda3-9c7875de9ac0/sims_3_cheat_codes_increase_needs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bba1e3-a3c6-4b65-b7b4-bf0b06bb930f/4927083080.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/2009_chevrolet_traverse_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/how_to_play_trouble_warp_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a835b6-cb59-457a-af84-51d7ad6a8132/momiguduxodanuzomedowi.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://www.gnu.org/licenses/gpl.htmlIn 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_off0001029a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 1724 bytes
SHA-256: a931ff3fa825443b93b369ae2d426ea300e579fad8992fa37b98769a4031c84f
font_01_sfnt_off00010b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B27 5928 bytes
SHA-256: a731750d25959c5b1df161a1eca35b6be88fe9e2356acffe6e93f64586e46b15
font_02_sfnt_off00011f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F49 5852 bytes
SHA-256: 070190071500e4e782f35bfd755afae89b66324ef3097a980fd68c75fb9893f1
font_03_sfnt_off00012e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E03 11924 bytes
SHA-256: cba76995f740ada64fb04d25887115f8c8c3731ca664e75b4c1cf75ab4a5eedc
font_04_sfnt_off00015681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15681 16028 bytes
SHA-256: 3e66ce8c90719045bf8f6c8d5f716325bbce29c89c8399c9e71e7e90b46a9b16

Open this report in the interactive analyzer, or submit your own file for analysis.