Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7be12285581383b…

MALICIOUS

PDF

74.7 KB Created: 2021-03-15 00:14:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d8494ecccfcd9eab215fe406ed61c53e SHA-1: 572eef323d015a0a2711b90e4c545aaeafda71bd SHA-256: a7be12285581383b6ea6cb9148b06d9e1f6ee2da958d562db6fcc5ebbed571d3
186 Risk Score

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 0.9989

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://fokemale.ru/wix?keyword=steelseries+merc+stealth+software PDF link annotation
    • https://gerogebu.weebly.com/uploads/1/3/1/6/131637886/lobojuzozevova-rofidetomadiw.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/31e919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446638/normal_603bf64d30d55.pdfIn PDF document text
    • http://dunodipike.sportsontheweb.net/fusukutekabisesibefaredo.pdfIn PDF document text
    • https://jikegasabum.weebly.com/uploads/1/3/1/8/131856907/8e5966ae03eebf6.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/2149783633.pdfIn PDF document text
    • https://zuwubusonelab.weebly.com/uploads/1/3/0/7/130739898/6544075.pdfIn PDF document text
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/fc57b28777725.pdfIn PDF document text
    • https://tagopebarezixog.weebly.com/uploads/1/3/1/6/131607889/9699923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459163/normal_5fe8d9318cabf.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/fusodorobubobenid.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/les_acariens.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5fd1f2827d80e.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/3960438.pdfIn PDF document text
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/dikat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368493/normal_5fc715a8885a4.pdfIn PDF document text
    • https://mobefoba.weebly.com/uploads/1/3/0/7/130776725/zudujaxima-rupezikadulake-sodusaxojapa.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/symbols_of_the_12_apostles.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
    • https://s3.amazonaws.com/debiwelof/the_best_quotes_ever_about_love_and_life.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/texas_toast_bread_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/zutupupafevinuvodeb.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/kavulujabavaluvokurosi.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_8db34689892540c888b255f63c34af62.pdf?index=trueIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_ee61e2ca81344493b93d4a0bd565ab29.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_ebf12ecc1de644c1985ac6133623cd98.pdf?index=trueIn 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_off0000daf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF7 5000 bytes
SHA-256: ade182a16d6fa7802c0a77a50afd13568c4d7a0dbaefcd99d93971d60bbb540e
font_01_sfnt_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 10372 bytes
SHA-256: 9c84446c81461ceca314dbbac4d6eba2130c8dfe8a20ed8d1d70f54de7bcfe79
font_02_sfnt_off00010f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F54 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2