Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd2e11043518bde…

MALICIOUS

PDF

95.2 KB Created: 2021-03-15 10:22:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b78675cef36f6a5d2c099ab6f7149a1c SHA-1: 5e57936cf3114489064a3ad5a6a7a7133c302165 SHA-256: 2dd2e11043518bdeba8796bc5e62bdeeb1dcfd36a5bf21cad8b462c51a0d3008
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO abuse tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external URLs suggests the document's primary function is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/wix?keyword=the+backyardigans+singing+sensation+the+yeti+stomp PDF link annotation
    • https://juwexulomo.weebly.com/uploads/1/3/4/3/134385858/91d27bd831f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443608/normal_603d2ee50ff17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_5fe8428c16506.pdfIn PDF document text
    • http://masimepipet.22web.org/colorectal_cancer_guidelines_uk.pdfIn PDF document text
    • http://pedrons.space/summary_of_the_book_code_talkerj6njp.pdfIn PDF document text
    • http://zozagibewaxi.iblogger.org/78569805047.pdfIn PDF document text
    • http://kujazudoxiro.22web.org/how_to_set_the_time_on_a_casio_wr20bar.pdfIn PDF document text
    • https://denosofebulapan.weebly.com/uploads/1/3/5/3/135347567/5430075.pdfIn PDF document text
    • http://mivetys.xyz/sigma_bike-computer_bc_16.12_sts_caddtq3p.pdfIn PDF document text
    • https://kexizinakit.weebly.com/uploads/1/3/4/8/134870698/fekiwafulaxoxuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_6011c59c4002f.pdfIn PDF document text
    • http://trend-sales.fun/domino_cookie_mix_recipen8dug.pdfIn PDF document text
    • https://mufamemibota.weebly.com/uploads/1/3/1/8/131856380/97daf6391ce91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_5fe6b3290d264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_603e788dbe999.pdfIn PDF document text
    • http://sq11mini.com/rc7_roblox_downloadybia4.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/1ff5d4c0-0463-48ec-b7a4-8ff1f7b1ff13/jajijesupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bc344d3-633d-46fe-8120-6a5d2d77dbd6/gedasekipaw.pdfIn PDF document text
    • http://tumizasikoxef.rf.gd/6332504241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/625ab843-8df6-42ce-b9eb-23b796d8818b/romance_of_the_three_kingdoms_12_pc_download_free_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99506e01-0189-46fe-97ab-b6fdd2b3bfd0/jexumuxuxivalerumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f6af3b-c543-45a1-bacd-83798e508b14/flashback_x4_power_supply.pdfIn PDF document text
    • http://meganisaniwo.rf.gd/chevrolet_tacuma_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c193babe-7ccf-4039-9fc9-639e9c87c118/90015680528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d85b92-9e9b-4c1f-9012-5ef68c220c2f/80540334827.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_off0001364d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364D 5712 bytes
SHA-256: 51a7597e0b7d1d59a4a80ea089c14e439ba66b26ad5741d7472d66d4e7476b53
font_01_sfnt_off0001498f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498F 11124 bytes
SHA-256: 8351786831cb7426ef51c720270983c3f33c0fb41c3760199f78c68ef7495fe8