Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c1793db12a9727…

MALICIOUS

PDF

76.7 KB Created: 2021-03-23 17:37:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d079f6efad4c0d7268ab11635815b1b1 SHA-1: 9e28a01b8da2380af837a237ad6536e991bcc9c1 SHA-256: 96c1793db12a9727af5a7bc01c97605b0133ea45f01602d83273b402e400df7c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://dafemum.ru/wix?keyword=the+sims+3+android+apk+%252B+data+download PDF link annotation
    • http://fartook.online/android_arduino_wifi_control_devices_with_esp8266_moduleagndy.pdfIn PDF document text
    • http://topstop.site/hoover_carpet_cleaner_furniture_attachment9e2e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485329/normal_6023f44228a78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5fefce1e6f3b3.pdfIn PDF document text
    • https://xatomurukazaj.weebly.com/uploads/1/3/4/3/134378662/526d126fb9df67c.pdfIn PDF document text
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/kavuga_jufegag_fudabawok.pdfIn PDF document text
    • http://frukt.fun/bloons_super_monkey_2_hacked_versiondfm1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_600d94f9a5c3a.pdfIn PDF document text
    • https://jawizadobem.weebly.com/uploads/1/3/4/7/134773472/33341d2f39cc9d.pdfIn PDF document text
    • https://lamegebepezaris.weebly.com/uploads/1/3/1/4/131438642/2481252.pdfIn PDF document text
    • http://frukt.fun/vet_assistant_courses_online_uk8m6hs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lunipadudatib.rf.gd/how_to_pray_for_rain_prayer.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/94522320513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e464e6f-998d-4379-9ecf-6b324ea105fd/tigupesiwowote.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/addition_table_1-_10.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/how_to_disconnect_a_hardwired_smoke_alarm.pdfIn PDF document text
    • http://juxibokadunume.rf.gd/xazijomab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/998d6a8e-78b3-4666-8ab7-686fef35627d/age_of_empires_conquerors_no_cd_patch_1.0c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a4c502-2d41-49a5-90ff-2dbdadd2e4db/98353893045.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/beswitched_match_3_mod_apk.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_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 5468 bytes
SHA-256: 182f7c273f290f703b5781ae1f830ad4fab7a1a119288bab43c950ff0b666522
font_01_sfnt_off000100cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CF 10700 bytes
SHA-256: 161b432c0797c932c4ee8539cf27ec1d2ba83563ceb9c82fcf66c0f550f04e90

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