Malicious PDF — malware analysis report

Static analysis result for SHA-256 f328de7fcbb17509…

MALICIOUS

PDF

84.2 KB Created: 2021-03-12 17:28:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b2b37e490b31316fbd269d1d2bae98fe SHA-1: e362c1dd5eb37bca5486039675a6d65a306620be SHA-256: f328de7fcbb175095664eca6b713900f7cc422025db673731926c242b7dcac44
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. The PDF contains a link farm with numerous external URLs, suggesting a phishing or SEO poisoning attack. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to potentially harmful content or facilitate further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/wix?keyword=sky+dancers+show PDF link annotation
    • https://cdn.sqhk.co/xobitabab/jdsQlif/30492732536.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/hg8hdgd/birdy_the_mighty_decode_season_2_episode_12.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/Xjehcjd/niwejiginav.pdfIn PDF document text
    • https://cdn.sqhk.co/kezulegol/vlngiid/big_bang_theory_staffel_13_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/ayHIjid/73991738765.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/f3b21739-713c-4e48-aed9-a0cd44a3c4d5/interview_questions_to_ask_project_manager_position.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc74431-84ac-4646-a681-10cec2448ef4/roliwolapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c47529-6923-4b73-b355-7562d3c1e99a/bosch_axxis_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f244ae-1711-46c2-abfa-76ba847cb03b/sivoximoxulepolireza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980ed8f2-246e-4393-86df-b9d8df3a619a/35914836748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/600c3017-8b9d-44b2-93ee-521fb1dd84af/why_am_i_getting_little_pimples_on_my_forehead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e76c7331-dac0-4c16-b53f-e564c2525243/savufufanitoruzise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcf50710-6a76-451d-8537-6e55615d6870/how_to_make_money_on_onlyfans_selling_feet_pics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/195c0952-5595-4d16-9db0-f47c77e2f031/14627700977.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_c097378a09264d0e872af2e1cc21df4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b225c4-59d4-49f0-bf46-39b1dbe187f1/rojota.pdfIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_af8b945b0c5244888f68d80e04e05d24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff01b05-d91c-4709-bfb7-ae4994a5fc7b/describe_the_three_estates_in_france.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2670598-0a73-4b43-98ca-a25b5cde0696/who_is_the_richest_shark_tank_investor.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E43 5356 bytes
SHA-256: 810af14a78efc524a40a530c3d2452ca5871a1c73627f43e6cb6e23dcecb2c42
font_01_sfnt_off0001208f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208F 10232 bytes
SHA-256: 15204b257bb5e0932492b393792f1581a49dc6c785c25ef366550f21d6372228

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