Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea280cb991ea9497…

MALICIOUS

PDF

84.3 KB Created: 2021-03-07 01:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b83c01ae580cb6f29636a04d267e1f70 SHA-1: 989109beac4505ecb8879e412949e2de7cabe5b2 SHA-256: ea280cb991ea9497026f493b77f347003ed79b77af951b12e88074735e9b6328
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a product listing that appears to be a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or scam operation. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification. While no scripts were explicitly extracted, the nature of the embedded URLs and the link farm heuristic suggest an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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://resalured.ru/wix?keyword=michael+kors+petite+norie+mother+of+pearl+dial+ladies+watch PDF link annotation
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/2259767.pdfIn PDF document text
    • http://universe1.space/27124381700tn5w3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412905/normal_5fce7c2c2d86d.pdfIn PDF document text
    • https://libuxematofep.weebly.com/uploads/1/3/1/0/131070581/mulabesazodutum-xesapujupetig-lovufurasu-dujapudez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455657/normal_5fe57e7266c67.pdfIn PDF document text
    • https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/e270bc.pdfIn PDF document text
    • https://cdn.sqhk.co/wexapitode/5idmjjR/96731011511.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/0jiEgfC/unnatural_synonym_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_6039494a9baf0.pdfIn PDF document text
    • https://cdn.sqhk.co/wifuponi/ehbjbhd/bad_day_at_work_2020_part_10.pdfIn PDF document text
    • https://vipegiwofavagob.weebly.com/uploads/1/3/5/3/135302795/664286.pdfIn PDF document text
    • http://fullstacket.online/are_nascar_collectibles_worth_anythingwwotn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450040/normal_5ff0cd8cf38df.pdfIn PDF document text
    • http://telemprom.xyz/gomorrha_serie_staffel_4_episodenguide50am6.pdfIn PDF document text
    • http://olymp-trade.top/sibarapetegilivikuvudija0iy89.pdfIn PDF document text
    • http://construt.site/40674018223gs58i.pdfIn PDF document text
    • https://gemexufata.weebly.com/uploads/1/3/0/7/130739895/4409705.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/oblicza_geografii_atmosfera_sprawdzian.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/journal_article_outline_template.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/fusion_gratuit_telecharger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5c82ac-fdb0-48ae-97f9-b3327056c0af/pdf_harry_potter_dan_batu_bertuah.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/allcast_pro_apk_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/sheetrock_sander_home_depot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f0ac9a-eb63-40a0-be8a-c6c1d3bd917b/how_long_do_you_cook_a_turkey_in_a_oil_less_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8500612d-017e-41b6-a13f-f81e28470fa8/84183958681.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68F 5556 bytes
SHA-256: c32bfd77e1d224bea15f49fe0baac1ee192c16f452365e874718fa5b1387c973
font_01_sfnt_off00010968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10968 10592 bytes
SHA-256: 7106db1d4c262ffbc8de531f149c7769196e343e02700ccac451303788e2bad9
font_02_sfnt_off00012d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D90 16144 bytes
SHA-256: aa1464b36b52ac156dd3ea04bc30a94b8376eaa6838293fad627926ea8981a5c