Malicious PDF — malware analysis report

Static analysis result for SHA-256 74987371d644eb44…

MALICIOUS

PDF

78.7 KB Created: 2021-03-09 08:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: eb666541e52d66d99e9e660a026ffdca SHA-1: 8c29fa2f649996fe6ec2bf28ae88eb991d772530 SHA-256: 74987371d644eb443dbeb0e7fe6113953dd2e9d1dcfb870e7b46843bab767974
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. These links point to various domains, many of which are hosted on disposable platforms like Weebly, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/wix?keyword=geometry+chapter+10+cumulative+review+answers PDF link annotation
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/539874.pdfIn PDF document text
    • https://vumenaxusavow.weebly.com/uploads/1/3/4/6/134600171/wepelolavivep_lesomamaboj_ponek.pdfIn PDF document text
    • https://vogoniboka.weebly.com/uploads/1/3/1/0/131070279/xezipis.pdfIn PDF document text
    • https://tiwavejesuma.weebly.com/uploads/1/3/2/6/132681866/jizatebijexibar.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/6400029.pdfIn PDF document text
    • https://dolevomebebozap.weebly.com/uploads/1/3/1/6/131636651/buxogivuloluvu-nenolopugenut-potob-wiwesazuxekefu.pdfIn PDF document text
    • https://wolaserirefuf.weebly.com/uploads/1/3/1/6/131637046/vubetofegapimi.pdfIn PDF document text
    • https://wufisosudima.weebly.com/uploads/1/3/0/8/130874090/5807231.pdfIn PDF document text
    • https://lajanasana.weebly.com/uploads/1/3/4/3/134368101/fezewelosenolutu.pdfIn PDF document text
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/2438d3c82f3.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/sodikagizakoxakole.pdfIn PDF document text
    • https://ruxibero.weebly.com/uploads/1/3/4/4/134403554/5b1e271.pdfIn PDF document text
    • https://dobuwejakunarek.weebly.com/uploads/1/3/4/7/134772316/jokufabuvaferaja.pdfIn PDF document text
    • https://fejilexa.weebly.com/uploads/1/3/1/1/131163980/degulujo.pdfIn PDF document text
    • https://bufibetotireguk.weebly.com/uploads/1/3/0/7/130739935/bunuwodaguzi.pdfIn PDF document text
    • https://ginixogigifigat.weebly.com/uploads/1/3/4/3/134367444/fizedovanolulakeroj.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/7f2e941a-e3e4-4a8f-b763-abc94b138290/4th_grade_math_curriculum_free.pdfIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_6d78947fde984cfdbe2b9820d7cc9e97.pdf?index=trueIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_1f5a29c98e8b4dbe9c71901928142db2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc4495c-c232-400e-b075-5ad19540c4bc/pmbok_guide_5th_edition_47_project_management_processes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd44d01-303f-4d3f-a576-4505e03a15e7/40015979945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22a313b-68d0-4ae0-b01e-177768f32bd6/samsung_bn64_tv_price.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_off0000e8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F4 3620 bytes
SHA-256: 4b050472912947e56c83802001a82107b9763520b10472c979ab3854bd6763d2
font_01_sfnt_off0000f5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E6 5652 bytes
SHA-256: 80ed2b0ca4350d681926d5d6f60143f7f92b97d5f35f38c2b71c0983e1104e97
font_02_sfnt_off00010918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 10180 bytes
SHA-256: 9dcdbe8142f101aefd729de38b3b6005a8ce7dfd6cf7d81c0c5b6d25263ee176

Open this report in the interactive analyzer, or submit your own file for analysis.