Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd51d2ceb0f02dd…

MALICIOUS

PDF

112.0 KB Created: 2021-03-05 00:21:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 373aeb8461f1f837ca758cfd1bf9f37f SHA-1: 65b42e35b5620186cd558b4f99ee03d6bc4d1ef4 SHA-256: ffd51d2ceb0f02dd10cd7095770f006770feceddc932328518d93d453b838c67
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://golowaki.ru/award?keyword=tipos+de+investigacion+de+mercados+cualitativa PDF link annotation
    • https://xajimago.weebly.com/uploads/1/3/0/8/130813364/68e803f7df7.pdfIn PDF document text
    • https://runidodejifam.weebly.com/uploads/1/3/4/0/134040950/2db46778ef7e.pdfIn PDF document text
    • https://pikitepilizoj.weebly.com/uploads/1/3/5/3/135332880/pugoze.pdfIn PDF document text
    • http://totalcreditreport.info/plautus_amphitryoni1kv6.pdfIn PDF document text
    • https://najabokaxosol.weebly.com/uploads/1/3/5/3/135300306/4676467.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/b98ccde78.pdfIn PDF document text
    • http://prodson.fun/96861580653tmnzn.pdfIn PDF document text
    • https://kusejatakobex.weebly.com/uploads/1/3/1/4/131438299/2704336.pdfIn PDF document text
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/sugubozaxi-luwol.pdfIn PDF document text
    • http://kir.center/drive_simulator_2016_lite_mod_apkcy51h.pdfIn PDF document text
    • https://nivagevap.weebly.com/uploads/1/3/1/4/131438423/6b4cf.pdfIn PDF document text
    • https://jewukezi.weebly.com/uploads/1/3/0/9/130970006/928528.pdfIn PDF document text
    • https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/vometebaralu.pdfIn PDF document text
    • https://tinuxitimo.weebly.com/uploads/1/3/4/7/134748051/jizotokefefera-zavujixuw-terizo-gipifanitalow.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/xodanedope_pewukupilogukew_vobofonuko_bivif.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/fevobelijogal/alone_movie_piano_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/wuxuzaf.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/mathswatch_worksheets_year_7.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/mens_burgundy_formal_shoes.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/how_to_connect_plantronics_co54_headset_to_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/xiaomi_bluetooth_audio_receiver_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/activesheet._pivottables_pivottable1._pivotfields.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_off0001773b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1773B 5404 bytes
SHA-256: c5e182ff6f83d4e59b5dbcc2c76c92ed88a551c56b020c6b4788454679bd7bb8
font_01_sfnt_off0001898b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1898B 11900 bytes
SHA-256: b9c09b3f23d211977b17544970ae0a346529b143882056bd504bd632e36ccfba

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