Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce874188a87d9b82…

MALICIOUS

PDF

77.1 KB Created: 2021-01-11 06:16:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 674750a8fa25a5e3825d68b066ff1d89 SHA-1: 86b3d3f3785a6d99d8fb665a0f00a19f4c03edb6 SHA-256: ce874188a87d9b82fed5e62ba6b0d8b1c74ab7b031439740f723d4ad81bdd23b
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://trafffi.ru/123?utm_term=step+up+2008+cast', suggests a potential phishing or malicious content lure. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', reinforcing its malicious nature. While no scripts were explicitly extracted, the presence of numerous external links points towards a malicious document, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=step+up+2008+cast PDF link annotation
    • https://mekaxojukana.weebly.com/uploads/1/3/1/3/131379168/badoditewutol.pdfIn PDF document text
    • https://site-1177991.mozfiles.com/files/1177991/xugidubekabutaxipafu.pdfIn PDF document text
    • https://mokomopepu.weebly.com/uploads/1/3/5/3/135333670/fe62ef1.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/sodokazid.pdfIn PDF document text
    • https://site-1172683.mozfiles.com/files/1172683/dragon_quest_11_ps4_vs_switch.pdfIn PDF document text
    • https://gipegilut.weebly.com/uploads/1/3/4/6/134699389/8214033.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/nexexopinodix.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/1007124.pdfIn PDF document text
    • https://webemibas.weebly.com/uploads/1/3/5/2/135298215/kimuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zukogi/zuvesedadogesujipuro.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/vimanam_film_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/5540406172.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/menu_subway_tijuana_otay.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/wd_40_rust_remover.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/free_french_lessons_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/rawobisikeponofoni.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/multiplication_word_problems_4th_grade_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/terapi_ascariasis.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_off0000ef27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 5368 bytes
SHA-256: 1ac4e8e6b2c62c4b672356acd85b6984bb27a7ca92909b6f26ccd825dc8718d4
font_01_sfnt_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 11104 bytes
SHA-256: ca9ab8f5c3b50faa15a59e811a8ae38cb2434cbaaa1909584da5df3d8365c7ca

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