Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcc4605aaa08ebf0…

MALICIOUS

PDF

74.0 KB Created: 2021-02-12 05:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 97c49fe8ce99daa44a78b81f03efcf1e SHA-1: 51ab2e6afb550c0b2e7ba872eb4fedd6ecbadee7 SHA-256: dcc4605aaa08ebf00f001c99b974ebed98f5ec2792d3ef517b278b28550e5801
186 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm. It contains numerous external URLs pointing to disposable domains and Weebly/sqhk.co hosted PDFs, suggesting a campaign to drive traffic or distribute further malicious content. The presence of embedded URLs and the PDF structure strongly indicate a phishing or SEO spam attack pattern.

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://druttle.ru/123?utm_term=guide+castlevania+symphony+of+the+night PDF link annotation
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/9460079.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/hPWjhgf/30650929057.pdfIn PDF document text
    • https://mafexanilexa.weebly.com/uploads/1/3/0/7/130739060/724a70e8252.pdfIn PDF document text
    • https://voloripilobolim.weebly.com/uploads/1/3/4/6/134635915/xudez-popaw-dowopomakomazir.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/egcOAsD/vodafone_yan_mda_kod_gelmiyor.pdfIn PDF document text
    • https://norogogobizifuk.weebly.com/uploads/1/3/2/8/132816096/vawerulitoje.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/ic2hhgj/titubigavi.pdfIn PDF document text
    • https://xeziguga.weebly.com/uploads/1/3/5/3/135392729/ripotajapowor-fesalobisajelo-jogogebegiz-didomonu.pdfIn PDF document text
    • https://lajawirefif.weebly.com/uploads/1/3/4/8/134869340/fidabusefozam.pdfIn PDF document text
    • https://cdn.sqhk.co/roduxokixuzi/eicHfPC/76555023392.pdfIn PDF document text
    • https://livupojinobiz.weebly.com/uploads/1/3/1/8/131856358/a225dd27.pdfIn PDF document text
    • http://hristogrigorov.com/geotechnical_site_investigation_reportji1do.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/ugiZieb/lonisawajimatanigulaxu.pdfIn PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/85e94352a30c.pdfIn PDF document text
    • https://tivavazo.weebly.com/uploads/1/3/5/3/135337759/5ac660.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/1e420e731.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/never_forget_you_piano_sheetvicwk.pdfIn PDF document text
    • http://secureappeal.com/wopewezaxokumojezibowel9xxvs.pdfIn PDF document text
    • https://cdn.sqhk.co/zavipudajose/giiaxHx/polaroid_originals_color_600_film.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 5668 bytes
SHA-256: b518c0f3706e2367ad0ec294ba31b71c74357462c0a103c1d481ad149275349e
font_01_sfnt_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 10632 bytes
SHA-256: 769750f93d1718f835d833aa972e61a8376dcb8b5a78c0b21a30a1d0d2085555

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