Malicious PDF — malware analysis report

Static analysis result for SHA-256 0610dca4303f5641…

MALICIOUS

PDF

74.3 KB Created: 2021-01-21 10:47:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7d45dc5b85460e39b6db782a851e5edb SHA-1: 29b2d6c980c84910aaec1c1dcc341ed7fef1c9dd SHA-256: 0610dca4303f56416ba719095750a22f8c7dbfa964422797ea58fa0eefcc48e6
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and the document body suggests a lure related to 'quotation templates excel'. The presence of external URIs and link farm characteristics indicates an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/aws?utm_term=quotation+templates+excel PDF link annotation
    • https://daxejinuvu.weebly.com/uploads/1/3/4/6/134645798/6714014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5fc1e5c4a90ae.pdfIn PDF document text
    • https://site-1175580.mozfiles.com/files/1175580/black_and_white_ombre_coffin_nails.pdfIn PDF document text
    • https://site-1204510.mozfiles.com/files/1204510/milebife.pdfIn PDF document text
    • https://site-1204796.mozfiles.com/files/1204796/56620281600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373264/normal_5ffacba77423e.pdfIn PDF document text
    • https://site-1174534.mozfiles.com/files/1174534/card_maker_crossword_clue.pdfIn PDF document text
    • https://joginogi.weebly.com/uploads/1/3/1/1/131163620/valinogafegi.pdfIn PDF document text
    • http://zamividiwido.22web.org/rabebaragajasegonexufosep.pdfIn PDF document text
    • https://wakepazatojux.weebly.com/uploads/1/3/0/8/130873951/wozezobonupaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417029/normal_5f95ddf952768.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/zetokizokuwus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413121/normal_5f9dd9c837cc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_5fd31557bc08e.pdfIn PDF document text
    • http://kadabafomelu.66ghz.com/serakivivewoxowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_5f95b365c8588.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/risalenefazozo/octopus_apk_support_google_play.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/sabunuwinevolisopepu.pdfIn PDF document text
    • http://foweroboxufafuv.epizy.com/40678967130.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/mandatory_reporting_laws_mn.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_off0000e757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE757 5112 bytes
SHA-256: 7f47436fbb66805e3e316b53236ca9af16d972949570fa765703b919f38df352
font_01_sfnt_off0000f8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AC 10264 bytes
SHA-256: 717fc91ebbb4a4e13f4e67095b491913c7f790ea33181a3160c78fcb0aa2fde1

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