Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4699a13e66b385c…

MALICIOUS

PDF

66.9 KB Created: 2021-02-23 05:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0b59c874845412bc7bccabc20c3040b8 SHA-1: b1e9aba17bc523e5cd52675f7a26c90ea6d714bd SHA-256: e4699a13e66b385ca13a71361275476a038dad4cbb7bca8d12bc88f574fe8dd2
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains or subdomains, indicating a link farm designed to direct users to potentially malicious websites. The presence of ClamAV detection and ML classification further supports its malicious nature. The embedded URLs suggest an attempt to lure users through deceptive search result-like content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/aws?utm_term=ups+store+near+walt+whitman+mall PDF link annotation
    • https://cdn.sqhk.co/vosiwuli/Wf7jeQQ/defence_application_process.pdfIn PDF document text
    • https://pofimutazotoxo.weebly.com/uploads/1/3/4/0/134000188/kuparipop.pdfIn PDF document text
    • http://wuwubaga.22web.org/bhoot_fm_18_october_2019_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zivudasexoni/UPiwQPA/tivemevedupoginoj.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/gdiaThb/32065304231.pdfIn PDF document text
    • http://tubajeroxe.iblogger.org/62397790398.pdfIn PDF document text
    • http://my-favshop.online/oldboy_2003_english_subtitles_downloadrbyxw.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/Dhfaghz/dabawudigosoka.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/fxfjihU/mamus.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/m4e7ji5/final_fantasy_iv_ds_ost.pdfIn PDF document text
    • http://mavpa.fun/sejudepetufavofijakilagov97fz.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/hbygggc/68656378117.pdfIn PDF document text
    • https://cdn.sqhk.co/jisujesox/0ijc3jb/rumexosibibizapoweweza.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/96icyii/real_time_shields_strategy.pdfIn PDF document text
    • http://nout-sale.site/silowkbe1z.pdfIn PDF document text
    • https://kobirozo.weebly.com/uploads/1/3/4/8/134846370/topele.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://timefata.epizy.com/kasisoxozed.pdfIn PDF document text
    • http://zoxumatodemake.rf.gd/employment_letter_of_interest_template.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_off0000c9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F7 5144 bytes
SHA-256: ec2199bdfe4e66bd173b6b89c1f0c3f22009fe4edcb9d62a957feb166f05bcbd
font_01_sfnt_off0000db57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB57 10248 bytes
SHA-256: 79e118be59dee781870a9b5c7c8a152bb41f9335c8c25059394a519b5e8fcdc6

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