Malicious PDF — malware analysis report

Static analysis result for SHA-256 4faafa0df929afdb…

MALICIOUS

PDF

95.2 KB Created: 2021-05-21 13:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: efc51b6c25cc6d7177859e4e137ae4f4 SHA-1: bb188b4388285e92a9f9d3c0d359a38bbf2cc402 SHA-256: 4faafa0df929afdbefbee99a0762d01f83c6de9fb8c846964ceafba3efa2cb23
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, forming a link farm, with one prominent URL pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to a 'candlestick course dvd'. The presence of embedded JavaScript, though not directly analyzed for specific actions, is a common vector for malicious PDF exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/strik?utm_term=steve+nison+candlestick+course+dvd PDF link annotation
    • https://wuzafonufiza.weebly.com/uploads/1/3/4/3/134341979/gadax-webapavadamebeg-mageni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451556/normal_6022b012cf354.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454984/normal_5ff3d383091c8.pdfIn PDF document text
    • https://verigidiloje.weebly.com/uploads/1/3/0/8/130874422/30dd11.pdfIn PDF document text
    • https://sofovelo.weebly.com/uploads/1/3/1/3/131379060/metavimuli-remivil.pdfIn PDF document text
    • https://mugoxebasupube.weebly.com/uploads/1/3/3/9/133999984/bugubew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413693/normal_5fe0b2782f70d.pdfIn PDF document text
    • https://bikojeril.weebly.com/uploads/1/3/3/9/133999271/77097.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejeseja/jevopamipumijole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b667f1a1-7f72-4387-a9ec-e013ee7e3563/what_difference_between_effectiveness_and_efficiency.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/login_template_angular_6.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/flat_stanley_10_book_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d545240c-7e78-4c33-80a8-c4dd5742d707/farberware_coffee_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/pearl_hot_tub_troubleshooting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/16790262242.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/xipenakexitofoxazilev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a50a7e-74d4-4706-94cd-a4f24ee040fd/33105342949.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/how_to_find_stocks_that_pay_dividends_on_robinhood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/458aa001-2a81-4e44-a4f3-a7100e660bf8/66948770614.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/62942759543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8fb858-d349-4d69-8965-32bc7bc124b6/80580516307.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_off000134f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F0 5160 bytes
SHA-256: b17ca703c11074a3408f53e5b212245c9d4c64587f28a17c2680227d045e9bdd
font_01_sfnt_off00014694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14694 12092 bytes
SHA-256: c8e4d5ed07f8cc560f1873a27c8a05c1fcab29188ae2fe00343fd7d6a59b6f72

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