Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9e6074d653afd9…

MALICIOUS

PDF

80.1 KB Created: 2021-04-17 16:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6dae852315087d0318f8914318a928fc SHA-1: ed432f77ae462bed04008081054c071b6c37a216 SHA-256: ed9e6074d653afd9f841577de2cbc1bc9bb964843639a3f09650aa0e03b39bdd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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.
  • 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://crophysi.ru/strik?utm_term=don%2527t+compare+apples+and+oranges+meaning PDF link annotation
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/mexojajurew.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/bhj1kii/the_wolf_of_wall_street_cast_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/jdggjfB/16119991431.pdfIn PDF document text
    • https://kevanosum.weebly.com/uploads/1/3/0/9/130968994/6080484.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/4hh6sSY/pofewixila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_606d5a9226cfc.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/fjf6iau/20380794828.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/gjNhdr2/kawasoxokobamibodo.pdfIn PDF document text
    • https://zejobivajetipud.weebly.com/uploads/1/3/0/7/130740466/2981995.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/gWha7hh/78171734059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488090/normal_603436472c28f.pdfIn PDF document text
    • https://musibagufes.weebly.com/uploads/1/3/4/5/134587398/mebisogevurilefapu.pdfIn PDF document text
    • https://cdn.sqhk.co/bijilixiger/2C8YjgW/88478838890.pdfIn PDF document text
    • https://vukumurumijolot.weebly.com/uploads/1/3/4/4/134433046/42763c0ee8.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/xamapebonijos/tezozexomumudivabute.pdfIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_1afff80aae244da9939b018950e3f80a.pdf?index=trueIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_b70de08bb4b8492493042fd704e86775.pdf?index=trueIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_ec70a5a73d2d4aeaa60c5be5f6552915.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/kabir_singh_bekhayali_song_status.pdfIn PDF document text
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_6e8c0ff6206747bc87e2dabe35de3e65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/likerajatob/moto_x_2nd_gen_price_in_pakistan.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_off0000f9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CF 5428 bytes
SHA-256: e0f76d17c570fe219f3c50ccebb41ffd93076034ff73640c6910c9a6cffaa06b
font_01_sfnt_off00010c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C31 11668 bytes
SHA-256: 262e4e106b0a28f775ef86290310a432823dd0a81192db2ba5ea708f0a06c795

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