Malicious PDF — malware analysis report

Static analysis result for SHA-256 602692eb8d35a8f3…

MALICIOUS

PDF

96.7 KB Created: 2021-03-24 07:15:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0686e60ad0408e3d30002172959af330 SHA-1: 1b8af940cddcd9bab4abebde28ebd8513290a764 SHA-256: 602692eb8d35a8f34f995b429aa210a05e699a7f7fb7ffccbad466a2db56646f
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body is heavily obfuscated and appears to be junk data, but the presence of external URIs and the PDF_SEO_LINK_FARM heuristic indicate the primary intent is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/123?utm_term=acid+forming+bacteria+in+milk PDF link annotation
    • https://cdn.sqhk.co/kobamebexog/ibBjaF3/2824898461.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/hihagca/31659531473.pdfIn PDF document text
    • https://cdn.sqhk.co/nonobepimaf/agd3e8n/retro_arcade_cabinet_build.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/6958979302.pdfIn PDF document text
    • http://phulop.store/blackjack_online_for_moneyer9gt.pdfIn PDF document text
    • https://cdn.sqhk.co/pokemazikera/4nliaq7/coin_master_cheats_2020_iphone.pdfIn PDF document text
    • http://lg-copyright.com/christmas_skits_for_church1hv1c.pdfIn PDF document text
    • https://cdn.sqhk.co/tolebilu/jheiakj/29938980290.pdfIn PDF document text
    • http://biomanua.website/nanenijadebesexf2u33.pdfIn PDF document text
    • http://dresdenpharma.ru/17952676350nze4v.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/radiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_ba2ff7de93174b2585e5d6831f024d54.pdf?index=trueIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_08f0925131ca418fb8c50bf72ee0bb19.pdf?index=trueIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_fc3710e859cd4b3ba1bbd970e11a0d6c.pdf?index=trueIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_4b8003cd9ee548d4aa8a740b9d562252.pdf?index=trueIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_a034e68e4b9647b888f934595f0ed010.pdf?index=trueIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_85b653394cc84633849b0871a1897d33.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_681894c8439d4048bbf4c18c1ec9c815.pdf?index=trueIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_019858cf9f4b43eeb01445265570b9ed.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC4 5356 bytes
SHA-256: c1d2bd2c94514cf048646cbf55be07fb80934864c1e0c9abd3b142b4d8135584
font_01_sfnt_off00014fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FE8 11204 bytes
SHA-256: 6f6fd4ec2d5bd40a325a4242fd66ac8f8f9632374951f88af65e16aa66584df0

Open this report in the interactive analyzer, or submit your own file for analysis.