Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3c0d7c5deadb67…

MALICIOUS

PDF

81.7 KB Created: 2021-03-24 02:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e92971f1db1a7a962afe8a0322975a5b SHA-1: c2f23705ad84d36d8ffaabe4549f5fbcad2fc4b6 SHA-256: ca3c0d7c5deadb67ac2a0642d0b3fab550c8c86d38ecaa1699cb6974877584af
166 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan. It contains multiple suspicious links, including one that is invisible and points to a malicious domain, and another that lures users with a keyword related to a popular application. The document's structure and the presence of numerous links hosted on disposable domains suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jumiwimov.ru/wix?keyword=easy+voice+recorder+pro+apk PDF link annotation
    • http://trynutra.shop/489005888410bkmy.pdfIn PDF document text
    • https://nedovewa.weebly.com/uploads/1/3/5/3/135316636/9147471.pdfIn PDF document text
    • https://cdn.sqhk.co/xovenekot/gjjfgjT/oregon_car_bill_of_sale_form.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/53108747956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419629/normal_6023d855a3538.pdfIn PDF document text
    • http://mandarin-fruit.space/scales_fx_-_deductive-logical_reasoning_examples81um5.pdfIn PDF document text
    • http://testersairf.xyz/gaxasaxav5j7w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404987/normal_602cb09208eb0.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/jbARhg5/carriage_hill_insurance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_605707f3ade75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498983/normal_605687a82da3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367275/normal_6007f166d0e3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414159/normal_60490cc5d0906.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471253/normal_5feb3d56e028b.pdfIn PDF document text
    • https://cdn.sqhk.co/narobalof/6FihVgd/lanotegutijowen.pdfIn PDF document text
    • http://loginwithfb.site/interior_angle_worksheetlfyag.pdfIn PDF document text
    • http://fortuneocredit.com/the_red_pyramid_main_charactersz602b.pdfIn PDF document text
    • https://bipusisep.weebly.com/uploads/1/3/0/7/130775903/2660635.pdfIn PDF document text
    • https://mavegisokelu.weebly.com/uploads/1/3/4/1/134131346/4420428.pdfIn PDF document text
    • https://cdn.sqhk.co/sefibenip/45Cgh7k/90839893238.pdfIn PDF document text
    • https://xivimuwujaka.weebly.com/uploads/1/3/4/4/134440816/8747456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412607/normal_6046400a09847.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
    • http://ladurabazidema.onlinewebshop.net/cd4081bcn_datasheet.pdfIn PDF document text
    • http://lurarapekakaka.atwebpages.com/71364259385.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/kefafoxekumuzesuraxigakur.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_off0000f47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47C 4820 bytes
SHA-256: 86bad820ebb122cd45f91dc7b218cb7dff89b2c90818b955ab988adc38144fd2
font_01_sfnt_off000104fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FA 11100 bytes
SHA-256: 044f16eef0f7782fce3ad04e1f3a8d0258d72f50f8f0250716d1f809e4267509
font_02_sfnt_off00012ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e