Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc377bd6719c2d5…

MALICIOUS

PDF

84.6 KB Created: 2021-05-29 19:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a87363bdae8921919686d927b5cf065a SHA-1: d9f461a6e7feb774d8e81caac14eed031ca14c73 SHA-256: 0cc377bd6719c2d5cd12d5ceb8f7f5f9a15124b06f37cd90c5c27a09b4ffb2d5
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=alma+de+cristo+acordes+j%25C3%25A9sed PDF link annotation
    • https://xozisimoxu.weebly.com/uploads/1/3/1/1/131164350/2165049.pdfIn PDF document text
    • https://vaxinukosiju.weebly.com/uploads/1/3/4/6/134625250/renenefizukexa-tudeperusadix-fawesufigu-ketukizopozag.pdfIn PDF document text
    • https://nidozasa.weebly.com/uploads/1/3/4/6/134680612/fasomudijenu_lamidexusopeweb_fazufeto.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/71418.pdfIn PDF document text
    • https://beredixe.weebly.com/uploads/1/3/4/7/134762790/fusawomunet_lobotudokujomi.pdfIn PDF document text
    • https://vumopiwerelo.weebly.com/uploads/1/3/4/7/134730258/2b50664b0058d.pdfIn PDF document text
    • https://laxabuzataz.weebly.com/uploads/1/3/4/3/134385801/9194f3.pdfIn PDF document text
    • https://libakitaxejadeg.weebly.com/uploads/1/3/4/0/134096258/sizemepamoxexu-fobupifilopew-jibesedeb.pdfIn PDF document text
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/5330230.pdfIn PDF document text
    • https://jazujuwomukoti.weebly.com/uploads/1/3/4/6/134684961/9d8be9b8eba.pdfIn PDF document text
    • https://goxapixexaze.weebly.com/uploads/1/3/1/6/131607486/297aa8.pdfIn PDF document text
    • https://kimetupuvojum.weebly.com/uploads/1/3/2/6/132680977/mifoket_xesubudu_siduko_gixujiv.pdfIn PDF document text
    • https://depuxibuf.weebly.com/uploads/1/3/4/7/134762413/dofokod.pdfIn PDF document text
    • https://dowoxadi.weebly.com/uploads/1/3/1/3/131380004/posiziwisiz.pdfIn PDF document text
    • https://nunavupogo.weebly.com/uploads/1/3/4/4/134471291/pexadune.pdfIn PDF document text
    • https://verorepu.weebly.com/uploads/1/3/4/7/134774070/1166008.pdfIn PDF document text
    • https://paboludozov.weebly.com/uploads/1/3/4/3/134333588/5082255.pdfIn PDF document text
    • https://liwufodabex.weebly.com/uploads/1/3/4/8/134872973/56e4ac5041c79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a03735a-3fc6-4014-9585-56d6440d1b71/oracle_sql_to_date_format_with_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/091e9051-7045-416c-8785-fc1bb86c0886/zekazimaponibejij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74583961-329b-435d-bde8-d7bf64d21bbf/6125658513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c533beb3-01a9-4e2c-9747-c491e6529e73/1_cal__kcal__cal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c575b392-8bf6-4fec-98b8-02a5032acff0/first_aid_kit_guide_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ff1c179-9a3d-4472-9565-5bec3f21dde4/vozoxomitibidokegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c3b0b66-a5c4-4f31-82dc-91de8e1cfa96/last_day_on_earth_survival_online_game.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_off000109db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DB 5292 bytes
SHA-256: d17a672e78d7606ebabe1d40861a66e39abea8363482711a287745b1d3732ab3
font_01_sfnt_off00011b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B78 12068 bytes
SHA-256: 69ec01961f75634fcaba381d69cc9aa1d70f946c6bf8c5549cbee3c36c1dec69