Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf16126e9a12e4df…

MALICIOUS

PDF

87.3 KB Created: 2021-03-31 06:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8e9e63af31ea452e6c4288a747227959 SHA-1: b277e1dc84d45ba90b10216025643b5bb7787fdf SHA-256: cf16126e9a12e4dffcad6d73ba53f6ba3c25fb3ccf8400d03925ef82c1b26603
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The file contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://leonvi.ru/strik?utm_term=central+pneumatic+air+compressor+oil+change PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419836/normal_6039f9df1e4e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465025/normal_5fff77f7dd85f.pdfIn PDF document text
    • https://cdn.sqhk.co/gesokusa/hiNbRIS/xaxazola.pdfIn PDF document text
    • https://gubuwogufulero.weebly.com/uploads/1/3/4/6/134608521/1448213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5fdc4506376c8.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/auIvjgR/this_is_the_police_hit_and_run_pazzi.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/0hhjdge/16841788027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477155/normal_601f9eb1c2c2d.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/0sgjchg/bilixokoposorejudiruxor.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/IGPhcsb/final_fantasy_ii_snes_rom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367656/normal_5fe1c2a754358.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/jibghjc/assistive_touch_turns_off_by_itself.pdfIn PDF document text
    • https://sujarazigis.weebly.com/uploads/1/3/0/8/130813042/2efe45.pdfIn PDF document text
    • https://panikudar.weebly.com/uploads/1/3/1/4/131437701/ruxazuvexedan.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/pQjgkcS/kendall_kylie_jenner_and_selena_gomez.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/qWoX8ic/cod_warzone_2v2_gunfight_tournament.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/d7b9321e-ae98-44fd-b5e6-ae69fc8d3bcc/eragon_full_movie_in_hindi_free_download_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d96cd1c-6ca4-44e9-925f-666a2274e1fe/zasedufewozuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b010e64b-8cdf-4d34-b226-d01cf1774aaf/13036446934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/760dc01e-3bb2-4b01-a6c4-c1b175eec008/blueparrott_b250-xts_battery_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c4d4c6-3fd4-4df3-86a0-3495b7188aee/what_is_the_short_summary_of_romeo_and_juliet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8471d81b-be91-447c-857b-1e356944baf2/sat_testing_centers_in_michigan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54451963-9984-4dd8-9226-1942e98251b5/what_is_ex_oriente_lux_meaning.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_off000117f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F6 5252 bytes
SHA-256: d3ff3a44c2f625afa5377f2c698b7f5a138dbe84b10f6e306bf7a6dd4d987950
font_01_sfnt_off000129a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A2 11120 bytes
SHA-256: c6ef62ebf27fe927118346d4e72b191fe5ad915192a3e8eac9b0771875aa6ca6

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