Malicious PDF — malware analysis report

Static analysis result for SHA-256 54dbc43936e80b13…

MALICIOUS

PDF

68.1 KB Created: 2021-03-05 08:26:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 23f1c86db01635adb3ed8c41b4d2b597 SHA-1: 807848fb6c4d8f08579e36dc073990f4e1f28fcd SHA-256: 54dbc43936e80b132ad8e848f84bc4e16435ed1987802b0881aa2b331198b7dd
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs designed to redirect users to potentially harmful websites. The presence of a large number of external links, some on disposable hosting, suggests an attempt to obscure the true destination or to distribute phishing or malware content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://xajibur.ru/wix?keyword=bob%2527s+carry+out+barnesville+ohio PDF link annotation
    • https://cdn.sqhk.co/givogaduta/b6hiheu/soxexakepej.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/ibhizjh/jiwijafezifox.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/kudavujokega.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/jdBRjiY/82462093824.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/advanced_excel_training_in_bangalore_koramangala.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/40970831598.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/hifhcEt/garatokedogulerinoxazu.pdfIn PDF document text
    • http://kokulotasuz.mygamesonline.org/dajumili.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/cggr0ga/70908354246.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_a71233b2c86c493d987eea016af5633b.pdf?index=trueIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_901e5fe1ae764e95b9793a9d5d2891aa.pdf?index=trueIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_e58e054fd08947f6853afd0d8a7c5787.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gekojulog/gosufotuwugosupovora.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/gromacs_molecular_dynamics_free.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/odia_calendar_2018_apps.pdfIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_9ff40d3c7efa4cebb113940e3785f128.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_19d0410f79fc49b18db8c64d996e0c47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/5039434498.pdfIn PDF document text
    • http://lefivaselefen.rf.gd/nudie_jeans_style_guide.pdfIn PDF document text
    • http://wabelat.epizy.com/tugusexegerofajixidi.pdfIn PDF document text
    • http://dufojamimusim.atwebpages.com/vonefugagopekate.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_off0000ce6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6C 5272 bytes
SHA-256: 40ae3940f63caa0be1c27400772db3fa833ba6cc49c1286ab60e340a3e42fa90
font_01_sfnt_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 10000 bytes
SHA-256: ec2983c6e5d7035009eb7d446073332c28c4253e359e67a57fd9b98ad09391ec

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