Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbf5b9d909e1a10…

MALICIOUS

PDF

76.0 KB Created: 2021-06-11 02:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6bc5437c39b0c67635fc5a2d623a1dbc SHA-1: b92bf1023e63a1e7093bf8d2eab91eff8a930b02 SHA-256: 7cbf5b9d909e1a10d79e6e1ebfa7cd556065815eb36169f1e15186d71f2b32ee
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with some pointing to potentially malicious or SEO-manipulative content, suggesting it's part of a link farm. The document body, though heavily obfuscated, contains a URL that appears to be a lure for movie content, likely a pretext to drive traffic to the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://philabc.ru/pbw?utm_term=shadi+me+jarur+aana+full+movie+online+free PDF link annotation
    • https://mikudope.weebly.com/uploads/1/3/5/3/135305195/wubawozijepadu.pdfIn PDF document text
    • https://nesefutuderixu.weebly.com/uploads/1/3/2/7/132740375/vusexonuvotavikato.pdfIn PDF document text
    • https://wepifoxo.weebly.com/uploads/1/3/1/4/131437594/f3cb03.pdfIn PDF document text
    • https://waxifititisapo.weebly.com/uploads/1/3/4/3/134363739/papup-saludukakabi.pdfIn PDF document text
    • https://mogowawagur.weebly.com/uploads/1/3/5/3/135350930/balolaziri_kimuxepusuzu_dubopunugu.pdfIn PDF document text
    • https://pebifabo.weebly.com/uploads/1/3/4/8/134892867/kulatabufapuvetaved.pdfIn PDF document text
    • https://litemavokof.weebly.com/uploads/1/3/1/8/131871991/5823862.pdfIn PDF document text
    • https://disinuxokisukoz.weebly.com/uploads/1/3/4/6/134610262/pijem_sezufiw.pdfIn PDF document text
    • https://pozosukezogi.weebly.com/uploads/1/3/4/3/134386022/9779618.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e3ce508f-78dd-465a-beab-d3b7ebd1d7d8/petejuxa.pdfIn PDF document text
    • http://jijagenaneke.pbworks.com/f/zudufuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b140dd2-a6ac-476d-b985-e8a4c22cf1c9/lagumunexigilajaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a417177d-0252-4c82-a369-5a34197939f7/93195711427.pdfIn PDF document text
    • http://gepefupugalu.pbworks.com/f/organic_chemistry_principles_and_mechanisms_solution_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e685805-dbe8-45d1-900e-2e852d1ce766/82852774453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d668a7c9-571d-4f5c-bf2f-af7ab1e5b90f/speed_queen_dryer_moisture_sensor_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d5e74c-c73e-4de7-b97a-6af9a069eff8/smoothie_recipes_healthy_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86fc2b37-c78b-4b4d-8bcb-cee1266a1d7b/tojopevexem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB94 5008 bytes
SHA-256: fc51163d00d7e78a4528e9d476c258d762400a5896ef42b214ba2baff88e7195
font_01_sfnt_off0000ec74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC74 11372 bytes
SHA-256: 75350b37acd9b3f3761d3919dbfa331a09f8ba3eba071c74b41a28da59b4b315
font_02_sfnt_off000112e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f