Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5a5566d7419b86…

MALICIOUS

PDF

79.7 KB Created: 2021-03-10 08:09:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 4e74ff4905a45b6def69fb76595d26e5 SHA-1: 86263af721d9c7f7b1149891d4690981f96eb706 SHA-256: fd5a5566d7419b86ab49d472db6c00987d292de845e5ebae84e91e67f23c59c2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to redirect users to malicious content. The embedded URLs and the PDF structure point towards an attempt to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=sleeping+beauty+anne+rice+beauty%2527s+punishment+pdf PDF link annotation
    • http://lazategomid.scienceontheweb.net/xiwep.pdfIn PDF document text
    • http://familyit.info/536876179727jz8u.pdfIn PDF document text
    • http://frasqen.online/diary_of_a_wimpy_kid_movie_2017_common_sense_media16es1.pdfIn PDF document text
    • https://palivifu.weebly.com/uploads/1/3/3/9/133986562/madesilotixaz.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/wowedaribup.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/moworebosiga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_601d509aee995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_602534111fea1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_6009cec304071.pdfIn PDF document text
    • http://mofirixubutibi.getenjoyment.net/jesuwetojolobite.pdfIn PDF document text
    • https://muduzefob.weebly.com/uploads/1/3/4/0/134018051/6695544.pdfIn PDF document text
    • http://xinuvaro.sportsontheweb.net/yamaha_rx-v379_4k_hdr.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/xesibogemixif_pejafidatagif.pdfIn PDF document text
    • http://salonlabs.xyz/cavidades_cardiacas2y2i0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lipabarud.atwebpages.com/jisugadodoruruvanebelubus.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_59a4c74652b842b8a216687688bddabb.pdf?index=trueIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_f06233ab24d44a4fa295f77733e7e2e4.pdf?index=trueIn PDF document text
    • http://rulamiji.onlinewebshop.net/rakaratefuju.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_d340d7dc6ce24899953a5ddaa8e7e721.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_96a2962f2d724ca29198c8f664dcd05b.pdf?index=trueIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_0f87b9b29d724a71807dc00bc6b475f9.pdf?index=trueIn PDF document text
    • http://bifovigavij.myartsonline.com/costco_vitamix_5200_vs_5300.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_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 5948 bytes
SHA-256: cff3dd8e610900a479823c0a384a2982778d7bcb83e85c511a10ed1b10ee19eb
font_01_sfnt_off00010e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 10276 bytes
SHA-256: 15dfba9b14e8562c59a1ee61cd8925db698a765d99f21aa2afb61ac6d5c8a94a