Malicious PDF — malware analysis report

Static analysis result for SHA-256 9970304513ce5673…

MALICIOUS

PDF

85.6 KB Created: 2021-04-14 09:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 570e2d83df6b55665b5e4b0d5a5f5223 SHA-1: fa8a49dceab40fb582ca5268bb8bafbd98e63500 SHA-256: 9970304513ce5673a842100f0b773346041964e59e4126c42f296bc8e70603ff
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF link farm. The primary URL points to a suspicious domain, and ClamAV detected it as a phishing trojan. While no scripts were directly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious or deceptive content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=what+is+included+in+brand+identity+design
    • https://kavisovilige.weebly.com/uploads/1/3/5/3/135308643/3734932.pdf
    • http://requiredjokblog.com/98233592456o70qs.pdf
    • http://leadtop.co/913793188024lgie.pdf
    • http://topdouche.xyz/238665367036ugrd.pdf
    • https://gevoxegugajaber.weebly.com/uploads/1/3/4/6/134668378/59969.pdf
    • http://giocodigital.space/spartacus_all_episode_480pvq6xo.pdf
    • http://eliyalte.com/sibaduvubusoxenemakosotxbogp.pdf
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/vusefetores.pdf
    • https://kezofufilulo.weebly.com/uploads/1/3/4/4/134488682/wexape.pdf
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/5503395.pdf
    • https://kutufexefe.weebly.com/uploads/1/3/4/6/134695169/rekekidosexoretogipo.pdf
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/5631965.pdf
    • http://bipiraxas.iblogger.org/powofofejagusakekifelu.pdf
    • https://regutipedazuvi.weebly.com/uploads/1/3/1/0/131071249/kifonidimilote.pdf
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/zukumumojurunu-guzugasa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pezofut/tufebofid.pdf
    • https://s3.amazonaws.com/xijuxosisomuna/kavebanidujoralepododom.pdf
    • https://s3.amazonaws.com/vezumobigodub/bakery_business_plan_template_word.pdf
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_f8e058292e084571a6ed2bd85224ebb2.pdf?index=true
    • https://s3.amazonaws.com/fodose/schwinn_270_recumbent_exercise_bike_for_sale.pdf
    • https://26aaa629-0581-4e25-ae32-a194504e59ab.filesusr.com/ugd/2d4e87_b9e0ddc2eb254a71a872323c96dec4ec.pdf?index=true
    • http://petodugutiz.epizy.com/37110856299.pdf
    • http://bawilifugoxak.epizy.com/party_garland_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110a8.bin
ce1e3f3e5579845732bda08ac6568715d3a72d17f63114933d66299aa800b246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110A8 5456 bytes
font_01_sfnt_off0001233f.bin
979ec40ab2aa4c3a5a5311f0dcb998ab8b3e1247b64f696e1e3c16b221eeb26a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1233F 11044 bytes

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