Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d56b3ca0636a6de…

MALICIOUS

PDF

76.1 KB Created: 2021-04-20 03:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2dab056d80116c80a62d461d92e47355 SHA-1: 5a9bc4e575ebbe36cf6ccd5db918186992d1260f SHA-256: 7d56b3ca0636a6decce0037644dd93d84e17f5e3f51fb92f4d8a12f37816eecc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded links, many of which point to disposable hosting or redirectors, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=motorola+pr400+battery PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421624/normal_601b424b3e6d9.pdfIn PDF document text
    • https://fozivumi.weebly.com/uploads/1/3/4/7/134761275/gasixepimutas-vewurox-sakewo.pdfIn PDF document text
    • https://giwaxevo.weebly.com/uploads/1/3/4/6/134644090/6765669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484804/normal_5fe4dc260f8c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_60628bff4c5ec.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/173757.pdfIn PDF document text
    • https://ratofesut.weebly.com/uploads/1/3/5/3/135304008/vopemevasug.pdfIn PDF document text
    • https://jugivukovetid.weebly.com/uploads/1/3/0/7/130739525/2820467.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pefijolal.rf.gd/9267141532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f912485e-2b13-488c-9441-65699a067bc7/31653595912.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/are_speed_queen_washers_any_good.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/24620441861.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/baal_veer_episode_950_free.pdfIn PDF document text
    • http://zutibebasonuf.epizy.com/guide_sur_les_initiatives_rse_sectorielles.pdfIn PDF document text
    • http://punegejofuj.epizy.com/19257027823.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/how_to_take_apart_ipod_nano_4th_gen.pdfIn PDF document text
    • http://zuwasezubolek.rf.gd/40423383887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf124b4-c5ad-4009-b952-c724fcd4abdb/solicitud_de_novia.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/35991691447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff1962c7-f733-459d-bbbb-7889c91107be/44711512353.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB9 5112 bytes
SHA-256: f8ef73cb4923261b3faf0d4224c99ebebcf4a20ee275cce5b6d5c0cb79502e0b
font_01_sfnt_off0000fc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 10948 bytes
SHA-256: ec2fdd5effe64dbe04cfae6633b8a648dc0f7c95e04090cdd28fdb56de5fab66

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