Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1d57efcbd0fb43…

MALICIOUS

PDF

87.4 KB Created: 2021-03-22 09:01:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 95d195dc7f571e5a7fd8356c388ed2f6 SHA-1: c4bf19998a11fce8f6c0f360511cb916e7c6c4b2 SHA-256: 1e1d57efcbd0fb43865ff41b2378d2d85602aa7d68547db33a435dc887ea0162
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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/strik?utm_term=can+you+stack+frigidaire+affinity+washer+and+dryers PDF link annotation
    • http://raisinsapp.club/gukajapugodadivebagofn2goz.pdfIn PDF document text
    • http://yourbigdick.space/redivulomirzwpw7.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/jdijEJd/33177359023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445881/normal_5fc73bab46917.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/djgijjf/amnesia_memories_characters.pdfIn PDF document text
    • http://alania365.ru/40730643974no2uq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485702/normal_5fcd0865af669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505687/normal_5fc89dce7e3ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_5fd828c82d9c5.pdfIn PDF document text
    • http://dirtygirl.fun/daxipasovusurulifoz90cqv.pdfIn PDF document text
    • http://sexedate69.site/harry_potter_wand_noble_collection_australiahf6a7.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/gxyiizh/retro_world_llc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_c16c22d933744fb2a61d2f2d8edb1e6b.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_47d372ac86f94708969f4b9d3550e51d.pdf?index=trueIn PDF document text
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_7cbadd1ee45e429ba57e75c07f564678.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d42fec6-65ed-4cf6-a52b-fc05a4134f6c/how_do_i_reset_my_viper_alarm_after_changing_the_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4bd09a3-8d25-47b8-a526-b27a2a010872/xiwexuzovosakexixapon.pdfIn PDF document text
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_08e1a5d0a6204cbdaff26e3a4c7f2199.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_2029ea86eb0a4dbc8a84236dc4aea827.pdf?index=trueIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_17fd585ee0924f72ab8bdb8fc791139d.pdf?index=trueIn PDF document text
    • https://9a86171b-24d8-4f43-8717-687e75280c8f.filesusr.com/ugd/6234e8_e842560bf5594c84a8ddf238c7cd0595.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d32914-90a6-4a15-a8e0-21d38d406023/lipemobufufus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D9 5416 bytes
SHA-256: 922d412a721e803d2b584654cc13ccdc1bd018150ab71bf7dc6e5f15d7739535
font_01_sfnt_off00011b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5A 11824 bytes
SHA-256: 13b7353c44e9534d70e6f6412485b8a7229b1dc146340f05b67b66df8ef60efe
font_02_sfnt_off000141b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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