Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e37913b1ea55316…

MALICIOUS

PDF

69.1 KB Created: 2020-11-25 19:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f0d2bd69b07b6ee4eec8010a4b293ad3 SHA-1: 17006258b7ab06a5d54bfd9030dd842d9bf120e4 SHA-256: 7e37913b1ea55316cdbe8c12437828a47c65462c331126144ac9a406efd166e4
244 Risk Score

Malware Insights

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

This PDF document is identified as malicious due to its function as a link farm, containing numerous embedded URLs designed to redirect users to potentially harmful websites. The presence of a link to a known malicious redirector, 'traffking.ru', and a large number of other external links strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://traffking.ru/strik?utm_term=why+do+people+join+cults In PDF document text
    • https://mekuxiwefajup.weebly.com/uploads/1/3/0/7/130739023/jafejufaren.pdfIn PDF document text
    • https://kobexozabegubom.weebly.com/uploads/1/3/3/9/133999893/4954152.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/c5254.pdfIn PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/7536576.pdfIn PDF document text
    • https://dilukali.weebly.com/uploads/1/3/4/5/134584555/7781646.pdfIn PDF document text
    • https://mesedegusi.weebly.com/uploads/1/3/4/6/134600151/dexix_boxolar_romowemejif.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/3138913.pdfIn PDF document text
    • https://jexetapi.weebly.com/uploads/1/3/4/3/134345775/26ad1e0.pdfIn PDF document text
    • https://guzejanum.weebly.com/uploads/1/3/4/6/134681017/5000101.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/xakajoziwibi/2016_ford_engine_vin_code_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/my_hero_academia_episode_1_english_dub_free.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/manual_for_whirlpool_washer_model_wtw5000dw1.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_off0000d2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FB 5048 bytes
SHA-256: 92d9b5a866b24040d947cbda8844af454553f63d7a9ac8a6e6e1005eed4f116a
font_01_sfnt_off0000e447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE447 10300 bytes
SHA-256: 664b5a37967fba0ea970d497af0d37052bba0950985a7e830e780e2f4deb3a50

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