Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e36af731afd64a6…

MALICIOUS

PDF

73.1 KB Created: 2021-01-24 02:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 69aa2d822a61134a9dab977a194505d0 SHA-1: e0c0ff43ffaad1c9145e8088a3afad0dc59c4c3f SHA-256: 2e36af731afd64a67de6366df3a429711f65423dd232e254e14ecb8a26073a27
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 by multiple heuristics, including ML and ClamAV, as malicious and likely phishing-related. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to distribute malware or lead to phishing sites. The presence of embedded URLs and the overall structure indicate an attempt to trick users into downloading further malicious content, likely disguised as a user manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/aws?utm_term=bosch+classixx+dishwasher+user+manual PDF link annotation
    • https://dudobafileziv.weebly.com/uploads/1/3/5/3/135331993/1254091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417208/normal_5ff8c5011d629.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/befcbc5f4139.pdfIn PDF document text
    • https://zipijuzoraz.weebly.com/uploads/1/3/2/6/132680866/xetupufubimo.pdfIn PDF document text
    • https://site-1172757.mozfiles.com/files/1172757/tugiguwerosilo.pdfIn PDF document text
    • https://site-1177705.mozfiles.com/files/1177705/fear_the_walking_dead_2019_start_date.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/mutinamun.pdfIn PDF document text
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/banuxevixutu.pdfIn PDF document text
    • https://zinegekoxemajaj.weebly.com/uploads/1/3/4/7/134767253/zojojo_rawemuxosa_rotobarut.pdfIn PDF document text
    • https://newadagunezadev.weebly.com/uploads/1/3/4/6/134684801/denan.pdfIn PDF document text
    • https://site-1176203.mozfiles.com/files/1176203/59081916543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_5fdb180fee47e.pdfIn PDF document text
    • https://kixivoveluvib.weebly.com/uploads/1/3/0/7/130775150/8fa5af0.pdfIn PDF document text
    • https://xijofufakeziti.weebly.com/uploads/1/3/1/3/131380729/5ac4f613a6.pdfIn PDF document text
    • https://site-1175164.mozfiles.com/files/1175164/49629802836.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454672/normal_5fec84402f0fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF9 5388 bytes
SHA-256: 2886bbbd8469d301a919900157458d63514137950e8bbacec242925b4d28daf1
font_01_sfnt_off0000ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 11804 bytes
SHA-256: 04335b4c4facc7fb86b198f3e91bc58664252ef65539cc0251fffbe9d533fecb

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