Malicious PDF — malware analysis report

Static analysis result for SHA-256 734e908ce6472565…

MALICIOUS

PDF

73.2 KB Created: 2021-03-23 01:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0c501aaeb86aca00e2b16ad7de1d6eb9 SHA-1: 17e9d2563031c23b92de6feba989751c015dd9e4 SHA-256: 734e908ce6472565b38dafbb3c1094a3ed058ffcd07f762f9b45363eb13254f4
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://xajibur.ru/aws?utm_term=biblia+de+estudio+reina+valera+1960+holman PDF link annotation
    • https://jazitilifa.weebly.com/uploads/1/3/1/4/131414561/5e390a535.pdfIn PDF document text
    • https://bubinaxe.weebly.com/uploads/1/3/2/6/132681619/kugoxovedele.pdfIn PDF document text
    • https://jalusuduzewot.weebly.com/uploads/1/3/1/4/131456012/2276440.pdfIn PDF document text
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/9888318.pdfIn PDF document text
    • https://namebobave.weebly.com/uploads/1/3/0/7/130739452/sevodu.pdfIn PDF document text
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/4f0e560.pdfIn PDF document text
    • https://koxowuberes.weebly.com/uploads/1/3/1/3/131379375/lawumovubej.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/dEhi4G1/silofufexubixuvepome.pdfIn PDF document text
    • https://cdn.sqhk.co/rufomezin/ahbnTrU/44356922795.pdfIn PDF document text
    • https://ditoleruv.weebly.com/uploads/1/3/5/3/135345680/3103353.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_60d47b3aeb9a4b7c857236d0dfa63676.pdf?index=trueIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_a45a26c2a82643828512f3f79b27dea3.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_d2fef31439804124b346a43f5b6c576b.pdf?index=trueIn PDF document text
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_d32631b41d0a485da5aa1f2cffe54672.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitirew/gigitojofipi.pdfIn PDF document text
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_90250e52203642faab071298c3208a8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/is_home_gym_effective.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/psychology_100_final_exam_answers.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_3d2f1775c1024e048e4f29bd87a367b8.pdf?index=trueIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_06c026e0a618424ebafca409f0e0ac3b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wovugi/bose_cinemate_gs_series_ii_model_number.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/potelaxagezano.pdfIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_1db499dbb61542db8a324a743211ab15.pdf?index=trueIn PDF document text
    • https://b3a8b944-ddec-4d17-9b53-5a1c05c66d8c.filesusr.com/ugd/314503_8d4e488338f24b83a025d23f36c97404.pdf?index=trueIn 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_off0000d8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E2 5816 bytes
SHA-256: a24cd9215d5991d6158d69926c8c10b4d74661deb90c5962bcdf3d5f8123cbf4
font_01_sfnt_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 12592 bytes
SHA-256: 5f53cbe589399c507ea4403dfda58eafa2f2d84faea6c7a781aa7ee71c271ec7