Malicious PDF — malware analysis report

Static analysis result for SHA-256 703bd85d00d6bcda…

MALICIOUS

PDF

78.5 KB Created: 2021-03-17 10:34:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fa3cbe7915475dda15e4aa9b5e125a93 SHA-1: 6ae9af56451702f0615c50529e22fd98fbb8d08f SHA-256: 703bd85d00d6bcdaf2c4f6c824724dde6a3f2d28eb673039cda7f245fdad550f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to lead users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://golowaki.ru/123?utm_term=transformers+shia+labeouf+2017 PDF link annotation
    • http://repaircreditscore.info/troy_bilt_pressure_washer_hose_fittings9ildt.pdfIn PDF document text
    • http://vekeludin.iblogger.org/683231889.pdfIn PDF document text
    • http://devlp.design/current_fall_foliage_report_coloradol9ssm.pdfIn PDF document text
    • http://rigares.iblogger.org/pdf_to_word_converter_app_apk.pdfIn PDF document text
    • http://fitnesspack.net/49627203763wsxim.pdfIn PDF document text
    • http://itayoga.space/503269265036srix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/26db6aa8-eec1-46b8-a7ab-1189b4d5ca0f/skyline_nomad_travel_trailer_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/56302854669.pdfIn PDF document text
    • https://eae06886-2bd4-4ea0-81b7-592f12109715.filesusr.com/ugd/738632_f03f33398b68400291d743ac64df3693.pdf?index=trueIn PDF document text
    • http://zekakodususebu.epizy.com/noxakukonagukajeg.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_8cf335c2c1464608b19fdaac52fb4dcb.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_3630c8d1485545bb99b43e36e2341b5c.pdf?index=trueIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_4b6a8b34fca543aab637dff746024487.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0ff1a46-93f8-491d-8933-175511a6a096/32961137645.pdfIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_e7008c4b6e06466db210858773030b40.pdf?index=trueIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_6065ad6f14f6489e87bc78c0725f5c05.pdf?index=trueIn PDF document text
    • https://90e68d66-75cd-4f9f-aa76-03b1e6b67b4d.filesusr.com/ugd/324cd8_53c0c095aa584bccb5f7178ecaef0f17.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/86909569841.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/83691439349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19228ffa-083a-4450-ba83-874d537a8577/kubafimupelivopowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f26981-fcc3-429a-bc38-c68b202b2bf1/98940712129.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/zomuladufonajukeke.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/pokemon_black_walkthrough_after_pokemon_league.pdfIn PDF document text
    • http://zilomit.epizy.com/winafalaleku.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_off0000f53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53E 5504 bytes
SHA-256: d3423f3199d95a6ad211efd26c683ad08cd6c8e9baf442d59d345b83ea2acd7f
font_01_sfnt_off000107d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D1 10724 bytes
SHA-256: 3e735bd6bee3440decd47bbb191c692664ec379879720bb5f76a1f223695f480

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