Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ef2ec170faa13b…

MALICIOUS

PDF

79.5 KB Created: 2021-02-04 12:06:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bd4dd2f6e7c40c9ab936cb19224aeedb SHA-1: a0696804d532737e306f38b871f28d534d51bc35 SHA-256: a0ef2ec170faa13bb80a0c695c37c2e56982ed69c25cf12f0089019280717ee0
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The PDF structure and embedded content, though heavily obfuscated, point towards an attempt to redirect users to potentially harmful external sites.

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://bologen.ru/aws?utm_term=christie+cancer+information+centre PDF link annotation
    • https://videxopejevis.weebly.com/uploads/1/3/5/3/135333638/17d8276fc0b.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/e5gnbKG/30986290808.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496826/normal_600862450e7be.pdfIn PDF document text
    • https://cdn.sqhk.co/ropikenetu/ghoy0ia/161855051.pdfIn PDF document text
    • http://vuxiparami.22web.org/9428046404.pdfIn PDF document text
    • http://wivafojoki.22web.org/76342191323.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410988/normal_60055cae7f465.pdfIn PDF document text
    • http://tujofifebituxuv.22web.org/67376677897.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/9gIPLdO/11925027476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixawoxikoni.epizy.com/43849966999.pdfIn PDF document text
    • http://losamipivoku.epizy.com/92851365868.pdfIn PDF document text
    • http://xekababemaxukop.rf.gd/98366087676.pdfIn PDF document text
    • http://roxubimolileko.epizy.com/acorn_slimline_stairlift_manual.pdfIn PDF document text
    • http://gelofobomafagez.epizy.com/investment_association_share_capital_guidelines.pdfIn PDF document text
    • http://magajavopisili.epizy.com/powomikesakuxumanugux.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_off0000f961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF961 4996 bytes
SHA-256: 284cda4eeacdfde70c85eff7393904e942abc0a2d71c52f242775c6c7fe000a9
font_01_sfnt_off00010a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A31 11268 bytes
SHA-256: 7975025f5985f0f6470050c9c6f252453f3ae99a67b724a7bfce82c4cd0f5754

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