Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50d3f2433687c30…

MALICIOUS

PDF

99.5 KB Created: 2021-03-16 07:38:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b2c47f326e714470598e3c978224a954 SHA-1: 59f99734142972b0418157d02cb1f7797da694bd SHA-256: a50d3f2433687c30e973a61e0cad3e095e28470d4268b4097178e08625ccaabb
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. It uses brand-impersonation credential phishing. 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 0.9998

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jotinebemoti.weebly.com/uploads/1/3/4/6/134681432/fibamib-fewawozegefirez-zifugimizokatar-pavebufeb.pdf.
  • 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://dafemum.ru/wix?keyword=atomic+theory+practice+answers PDF link annotation
    • http://scrlt.xyz/how_to_connect_behringer_xenyx_1204_to_computerhvn8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411921/normal_6000750dd8da2.pdfIn PDF document text
    • http://tiktokhd.design/zabukotep1l.pdfIn PDF document text
    • http://guromufupadaf.iblogger.org/ako_zistit_heslo_wifi_android.pdfIn PDF document text
    • http://votixowet.22web.org/debenhams_bedding_fitted_sheets.pdfIn PDF document text
    • http://seamanygau.best/wulesedabijugofujavhg.pdfIn PDF document text
    • https://cdn.sqhk.co/niminililez/ihchfYO/88848649465.pdfIn PDF document text
    • https://jotinebemoti.weebly.com/uploads/1/3/4/6/134681432/fibamib-fewawozegefirez-zifugimizokatar-pavebufeb.pdfIn PDF document text
    • http://7lessons.website/dino_world_jurassic_dinosaur_game_mod_apk5a9pw.pdfIn PDF document text
    • https://cdn.sqhk.co/sorifalemuj/NZhijbl/napuv.pdfIn PDF document text
    • http://wacc-cat.org/73028023393h1mjs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_602b41c111c13.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/32gjbhe/caller_name_talker_ringtone_free.pdfIn PDF document text
    • http://originalhallyu.com/arkansas_commercial_drivers_license_practice_test8k1cl.pdfIn PDF document text
    • https://movobukibajub.weebly.com/uploads/1/3/4/5/134597216/1358528.pdfIn PDF document text
    • https://cdn.sqhk.co/widobixi/cJjbzNZ/beautiful_place_hd_photo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kixozixid.rf.gd/26236363867.pdfIn PDF document text
    • http://xorewabamav.epizy.com/45631861920.pdfIn PDF document text
    • http://leniwijob.epizy.com/attributes_of_god_and_their_meaning.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14479 5324 bytes
SHA-256: d7796f350e0271ac57544c9a1a3b788a7a1aee1758016fe31861c638a349f9ef
font_01_sfnt_off00015680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15680 12984 bytes
SHA-256: dddf4a3c36253ec6c5890624ca8011e538925ed4bf917e6bdbdcdd0023e8e4fe

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