Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bc38907e1aca75…

MALICIOUS

PDF

84.1 KB Created: 2021-01-25 15:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 56921d495e4e59c6531f06cb16aaeb6d SHA-1: aa9857613e9ffac46404854fa12f703c1e7770ea SHA-256: a6bc38907e1aca759bf06271d798cdf8217b5a1061c65df0da05dac2808ff60d
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of external links and the nature of the detection indicate a potential for malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://trafffi.ru/aws?utm_term=interior+design+company+website+templates PDF link annotation
    • https://cdn.sqhk.co/sirazisiluz/Hgcgjii/usa_gay_dating_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/gheLkij/inditex_black_friday_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/deguxikezu/jbjcWd8/futubexotatetiledisobe.pdfIn PDF document text
    • http://vodoroding.info/tifizemofafyvju.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/88icuhG/sirunixe.pdfIn PDF document text
    • http://lozajakar.iblogger.org/admission_form_format_in_microsoft_word.pdfIn PDF document text
    • http://reabook.online/31618694642d34as.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/aSkbjcl/stellaris_armchair_commander.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/9806211.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/cZP3ign/manenarawevizagow.pdfIn PDF document text
    • http://likelid.xyz/bapipimipubunijul69.pdfIn PDF document text
    • http://magicwoolshop.com/necromancer_story_hack_yeuapkm7c6p.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/hgidiaz/hello_kitty_cafe_truck_menu_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/ropimipaf/OGujiha/losodusojib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://siwofemevap.epizy.com/reading_for_topic_and_main_idea_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/94080466620.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/4889287105.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/american_parliamentary_debate_format.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/binilibemorekowep.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE9 5452 bytes
SHA-256: 22526f1a750525110b19519f10fa1a1421cf3c80826140cb0c50e570f5d2e095
font_01_sfnt_off00010f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F64 10892 bytes
SHA-256: f28da8ae6b8568abf42af3c2c56966cf5955c492738ddaa71d23e4752fc2cb18
font_02_sfnt_off00013457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13457 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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