Malicious PDF — malware analysis report

Static analysis result for SHA-256 08908a17af5dca98…

MALICIOUS

PDF

89.0 KB Created: 2021-05-15 16:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e55e610b10764ce0768c0579314a49f9 SHA-1: aa9042e07b0cb12f6620454f6ab2575ce2a095ae SHA-256: 08908a17af5dca9855ca97a957871779ecf1471f8c1e52c226f53c5e67361d9c
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://seumenha.ru/strik?utm_term=jesus+calling+sarah+young+paperback PDF link annotation
    • http://homebig.space/tratamiento_de_trombosis_venosa_profundamlyef.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/7N2jhCD/oxygen_hd_icon_pack.pdfIn PDF document text
    • http://simultaneously.space/851342376040rw6i.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoburet/dUjbheq/brent_faiyaz_trust_video.pdfIn PDF document text
    • http://peuly.xyz/jugifikonigyvoyv.pdfIn PDF document text
    • https://togoxijagujeg.weebly.com/uploads/1/3/0/7/130775712/5328994.pdfIn PDF document text
    • https://wexaluzeneroxer.weebly.com/uploads/1/3/0/7/130776054/najoluji-lanerexebujim-zakumir-liwada.pdfIn PDF document text
    • http://livethailand.fun/katetoronixefebog69mw.pdfIn PDF document text
    • http://p-kavkaza.ru/is_dmv_open_in_scu1vpu.pdfIn PDF document text
    • https://katebobuwusa.weebly.com/uploads/1/3/1/3/131384636/3f7d7150.pdfIn PDF document text
    • http://zespodsvetkoy.site/hacked_clicker_heros29khn.pdfIn PDF document text
    • https://dokalifuli.weebly.com/uploads/1/3/4/0/134096730/ee0482ba6945f3.pdfIn PDF document text
    • https://bupulaserora.weebly.com/uploads/1/3/1/4/131437689/2052487.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/lhcjxij/saneniximugunejupekiv.pdfIn PDF document text
    • http://dopenukivo.22web.org/big_buddy_propane_heater_manual.pdfIn PDF document text
    • https://wudegilunukoga.weebly.com/uploads/1/3/1/3/131379548/c43da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diwomikutaz.epizy.com/discounted_cash_flow_stock_valuation_spreadsheet.pdfIn PDF document text
    • http://libiwozurogufo.rf.gd/tapupim.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF15 5488 bytes
SHA-256: e81d0c584b1c3bf4ddb7a3d53c5d08ce798b010eaaddc7887615e81dd2bc3587
font_01_sfnt_off000111b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B8 1952 bytes
SHA-256: accaceeb33bfc6e1bd405ccf38ad3f293e5702f423aa179c28c4c144154b86ea
font_02_sfnt_off00011b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1E 10768 bytes
SHA-256: fd5993d88c8ea162be0036891e297a99d6d06506fe5111c1d5b4163e32429a66
font_03_sfnt_off00014011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14011 16384 bytes
SHA-256: f53b43e12006e3d52612f085e6e184fa5bba3604999f0cb64562e6bb996dc06b

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