Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab4e2c835e572ad…

MALICIOUS

PDF

74.5 KB Created: 2021-02-23 20:09:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 254a00fc83c6e87fa3ba19d7f3c02763 SHA-1: 2cfe57f9bc1e4d451d5e387bace966fb1b1c4201 SHA-256: 8ab4e2c835e572ad08d618880d743c305038d8df58da028a0db2712082fda825
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://maypoin.ru/wix?keyword=brs+biochemistry+7th+pdf PDF link annotation
    • https://ripabukufekova.weebly.com/uploads/1/3/0/7/130738984/futotofowefoja.pdfIn PDF document text
    • http://kvrovk.xyz/dragon_quest_minecraft_game4x5lv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480174/normal_5fc7535aa006e.pdfIn PDF document text
    • https://cdn.sqhk.co/nezuxada/eAygeid/rupera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_602261f71795a.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/cjfha2C/85460946882.pdfIn PDF document text
    • https://kunewosixur.weebly.com/uploads/1/3/4/3/134393142/3744908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451225/normal_60255837a7d27.pdfIn PDF document text
    • https://bodupakodekafas.weebly.com/uploads/1/3/2/6/132680796/19b0a8357bae316.pdfIn PDF document text
    • http://1eyvgo.xyz/98421023566oe14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481821/normal_5fe715726a924.pdfIn PDF document text
    • http://it50life.pro/woxugibidibzmv2j.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/jdxgdoC/49011218771.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/2Oe4PTy/from_the_sea_game_hack_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446914/normal_5fe848ea72fd0.pdfIn PDF document text
    • http://uscarinsurance.info/gufetanagufawufawerepawebxn760.pdfIn PDF document text
    • http://bobimesufapi.iblogger.org/nurojubupuxejopusej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joriboka.epizy.com/53193112891.pdfIn PDF document text
    • http://kepikinol.epizy.com/reposeramuvaduz.pdfIn PDF document text
    • http://dujisuga.epizy.com/77741568481.pdfIn PDF document text
    • http://dufemeg.epizy.com/lenajopiganasituzatesib.pdfIn PDF document text
    • http://rileponabamel.rf.gd/4_temperamentos_sanguineo_colerico_melancolico_fleumatico.pdfIn PDF document text
    • http://luwulifinuneti.epizy.com/buyers_guide_salina_ks.pdfIn PDF document text
    • http://luzawuwu.epizy.com/kpop_idol_quiz_2018_answer_level_9.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_off0000db60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB60 5524 bytes
SHA-256: 2070a7bda1b04077d1ecc828cc0d4558061e5f1576a871b8ae3be977a84dc993
font_01_sfnt_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 2012 bytes
SHA-256: 98de79b297e3797e740cfbde3538a37bcda84e2cac2672723d669a8421f405b8
font_02_sfnt_off0000f740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF740 10756 bytes
SHA-256: 60735bdaa489ac673f7bb8fcfb7ecfce5f97024dee2aab67dd6efb17a20f7f9a

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