Malicious PDF — malware analysis report

Static analysis result for SHA-256 0941a48851077040…

MALICIOUS

PDF

83.7 KB Created: 2021-03-11 12:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ba0f38d37c298a1b6f6867efb2fca7af SHA-1: 089fcc0a50d0825411897f114c094671f77318ba SHA-256: 0941a4885107704056738bef42181c6875de36d3df158bb97a22f1de805c3ee3
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable domains and potentially part of a link farm. The document body is heavily obfuscated and unreadable, suggesting it's not meant for human consumption but rather to host or redirect to malicious content.

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
  • 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.
  • 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://fokemale.ru/award?keyword=anencefalia+embriologia+pdf PDF link annotation
    • http://goloszauniver.fun/58089516392jju3h.pdfIn PDF document text
    • https://meruvaxog.weebly.com/uploads/1/3/4/8/134877221/divokivude.pdfIn PDF document text
    • http://testrun.ru/business_continuity_management_good_practice_guidelines_2013o0qpf.pdfIn PDF document text
    • http://vizit.store/byousoku_5_centimeter_sub_indo_1080pcc9jo.pdfIn PDF document text
    • https://zejobivajetipud.weebly.com/uploads/1/3/0/7/130740466/lafiloxogako.pdfIn PDF document text
    • https://cdn.sqhk.co/puroneruk/iewu8PZ/monument_valley_2_soundtrack.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/vinifamaweku.pdfIn PDF document text
    • https://mixofugu.weebly.com/uploads/1/3/4/3/134351041/voropameno_tomoze_varose.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/didiko.pdfIn PDF document text
    • https://muxasikij.weebly.com/uploads/1/3/1/8/131872285/6666613.pdfIn PDF document text
    • https://rigukolanerimi.weebly.com/uploads/1/3/4/5/134519373/wepiminewuluwupe.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/RCrtg61/54296893949.pdfIn PDF document text
    • https://dutukoviwu.weebly.com/uploads/1/3/0/8/130873875/dininiwol.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/JsuhGjb/xipegutufinutusaloz.pdfIn PDF document text
    • https://tadizusojad.weebly.com/uploads/1/3/2/7/132712436/f5c5e4f799f907.pdfIn PDF document text
    • http://uablog.site/26386770555vll1q.pdfIn PDF document text
    • https://xamonato.weebly.com/uploads/1/3/2/8/132814301/7297063.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/gjghggo/lenovo_chromebook_touchscreen_replacement.pdfIn PDF document text
    • http://cetop.xyz/92233157280a627d.pdfIn PDF document text
    • https://widewosum.weebly.com/uploads/1/3/0/7/130775244/jezed_vejavevuxo_xiwolu_jumofog.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/buwosevax/forex_candlesticks_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/hanuman_chalisa_telugu_lyrics.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_off00010a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5C 5428 bytes
SHA-256: d8a556d946c3621fce3b4ee158796de363922859dd13275059129fc9037a1de1
font_01_sfnt_off00011cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB6 10700 bytes
SHA-256: 583b69d15ef40ba3cd4b22136c92c6f34d3292b529505ec09095570b18caaad9

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