Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6da3d7fce867574…

MALICIOUS

PDF

80.3 KB Created: 2021-03-19 03:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 64f6d6c4967684f724eee1dfaf6800e7 SHA-1: f6b3b15c3b8f5dd9f27d76fced8d29cc575db4c6 SHA-256: e6da3d7fce867574db6f598527883ea02ac861e071136c085ebee503d67c2802
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting a phishing or malware distribution scheme. The primary URL, 'https://midufefew.ru/wix?keyword=arctic+pro+portable+air+conditioner+7000+btu+manual', is presented as a search result for a product manual, likely to deceive users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://midufefew.ru/wix?keyword=arctic+pro+portable+air+conditioner+7000+btu+manual PDF link annotation
    • https://jamelowo.weebly.com/uploads/1/3/1/6/131606155/846738.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/a2c69gc/spinal_stenosis_surgery_recovery.pdfIn PDF document text
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/pefisekebabij.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwebuvowo/fIFieH0/bibitonozurutusidedumukor.pdfIn PDF document text
    • https://xadamunakufadi.weebly.com/uploads/1/3/3/9/133986396/5337944.pdfIn PDF document text
    • http://rogemuso.iblogger.org/98911152624.pdfIn PDF document text
    • https://robesiladobaluj.weebly.com/uploads/1/3/0/8/130813577/gegelirir.pdfIn PDF document text
    • https://xazegonegexedej.weebly.com/uploads/1/3/2/6/132683071/binapa-wuzukamu.pdfIn PDF document text
    • https://zunemugegixado.weebly.com/uploads/1/3/4/6/134698728/4c81f7c5f052.pdfIn PDF document text
    • https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/77cc2f0d191fc89.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/XijcYNr/89577231161.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/ha3fADf/halloween_movies_disney_channel_schedule.pdfIn PDF document text
    • https://monubigikupo.weebly.com/uploads/1/3/4/4/134493781/9a4128921d46c17.pdfIn PDF document text
    • http://selolaz.66ghz.com/yoga_exercises_for_back_and_neck_pain.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/4182577.pdfIn PDF document text
    • https://cdn.sqhk.co/kofosenolo/hhjiiOh/60802166990.pdfIn PDF document text
    • http://puveramodibaf.22web.org/xonaravalifepixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tibibexubedumu.rf.gd/binaural_beats_meditation_free.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_a6c220b6e55543f5ad512cea7711133c.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_94355c9f3f984a87b41eb12e56dc03a4.pdf?index=trueIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_18dc1289668542ef92c59a3a6ac2540b.pdf?index=trueIn PDF document text
    • http://satuvet.epizy.com/fenomomudek.pdfIn PDF document text
    • http://kedenutorufet.rf.gd/apple_developer_coding_guidelines.pdfIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_a03d39185efc484199a73d2072af4e05.pdf?index=trueIn PDF document text
    • http://feruvine.rf.gd/asus_rt-n66u_custom_firmware.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 5272 bytes
SHA-256: a3ff26f0ef6ece960e9d1151b8ddb8599f17634bfe10301151eab21757d9bd52
font_01_sfnt_off0000fd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD38 11796 bytes
SHA-256: a45c6763dc6e432918d7cc5ddd1797786b282cdbd41f001e3514630522697ecd
font_02_sfnt_off000124fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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