Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec6c285bdacb91b…

MALICIOUS

PDF

120.6 KB Created: 2021-04-17 11:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9496a5596c255220bf0d4bb4cc536f57 SHA-1: d7f2de90f444049f6f37720113ca098cb6acea71 SHA-256: fec6c285bdacb91bfecb5ea7ad0519cca09da4b3ac37cd4b07eb1f5464e6e7f7
244 Risk Score

Malware Insights

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

This PDF was flagged by multiple critical heuristics as malicious, including a redirector link and a large link farm hosted on disposable domains. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous links to potentially malicious or SEO-manipulating content suggests an attempt to lure users to external resources, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=pioneer+sph-da210+manual In PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/23125f.pdfIn PDF document text
    • https://menaminalopu.weebly.com/uploads/1/3/5/3/135318725/c995d41.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/5040889.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/bhc36jc/cruise_lines_covid_testing.pdfIn PDF document text
    • https://cdn.sqhk.co/wareberefiz/ghhjifG/72103313440.pdfIn PDF document text
    • https://cdn.sqhk.co/xizubutagen/PXgcDgi/graphic_designer_job_salary_in_dubai.pdfIn PDF document text
    • https://cdn.sqhk.co/nixagigad/ji2vpjh/elvis_presley_greatest_hit_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/nitagalut/3hjjVvN/nufuxisi.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/hdgnjeX/bodirorexutinelazere.pdfIn PDF document text
    • https://cdn.sqhk.co/rojisixel/hiaihmz/vegetable_chopper_electric_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/gcDgghf/hot_springs_story_2._4._2_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/mBjdmhi/18808402004.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/jhfRyjj/96283531128.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/ejeHAPe/payaliya_bajni_lado_piya_mp4_free.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/rie3wRx/swamp_people_2020_cast.pdfIn PDF document text
    • https://felavutiz.weebly.com/uploads/1/3/1/1/131164211/xedulotipov.pdfIn PDF document text
    • https://kofagegupuk.weebly.com/uploads/1/3/2/3/132302723/futuligudu.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/neviwove/49800750020.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/nesazifefazopuro.pdfIn PDF document text
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_28538c37a4494ff2b449df8a0b35f34d.pdf?index=trueIn PDF document text
    • https://cdb53ace-3f3f-41e1-823e-0ecf3add8ba2.filesusr.com/ugd/47e9e0_6e7d5f7e002241ecb0c78a3ef915b1be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisagoz/what_are_the_star_wars_series_in_order.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/5516910503.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001668f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1668F 1748 bytes
SHA-256: aa841bfd75b6f88091edad5c6326f03e6a2b1e8843942bbafe541cc2d84f3848
font_01_sfnt_off00016efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EFD 5160 bytes
SHA-256: b19c14e659ea082e16a6289d01e6302b907db5ef565952837b6e070b620f2c63
font_02_sfnt_off000180f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180F0 5560 bytes
SHA-256: c3167e6566bbcc3d782a92199649650e2649808f8d39dea2140dd89c27dbf127
font_03_sfnt_off000193b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193B6 13404 bytes
SHA-256: 64349aad2873c0c572a7893357569f9f3659b974f387d999cdf43331748fe22c
font_04_sfnt_off0001be70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE70 16116 bytes
SHA-256: 786affa9fbbc988e9c4b167f299f5a2851cd611154c9b4b4a7fab9cccde047d3

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