Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d86f527b1dc72a…

MALICIOUS

PDF

80.7 KB Created: 2021-04-06 08:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 387ea6c6f5da0a217824739be4e90fd7 SHA-1: 463425a67c2de67f542b6a15e8bc11399aa50fcc SHA-256: a6d86f527b1dc72a66eb69683803cf351dc63903573d7769bff1f9008e66db03
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary external URL, https://xezojetit.ru/wix?keyword=robert+jastrow+god+and+the+astronomers+pdf, appears to be a lure for users searching for specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/wix?keyword=robert+jastrow+god+and+the+astronomers+pdf PDF link annotation
    • https://cdn.sqhk.co/lisesemafo/gigdN1s/8186049910.pdfIn PDF document text
    • https://weroxodadugofu.weebly.com/uploads/1/3/4/5/134503620/7429805.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/jegeid7/borezezikaraxenazizigowe.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/zumivag_pogabisivux.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/kemirodididuz-fekopalofolo.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/iakjaih/10878772832.pdfIn PDF document text
    • https://sobapeseg.weebly.com/uploads/1/3/1/0/131070394/9837650.pdfIn PDF document text
    • https://gujejitemisadud.weebly.com/uploads/1/3/4/3/134354005/bosuzogejuvewu-tixevexa.pdfIn PDF document text
    • http://jatemiju.22web.org/69598986784.pdfIn PDF document text
    • http://teporad.22web.org/manual_blanqueo_de_capitales.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_d350a5706a01445999aac923e7c4dd44.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/2009_mercury_25_hp_4_stroke_specs.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/aasld_idsa_hcv_guidelines._2017.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_83074ab4e92a49b294768c2e29180608.pdf?index=trueIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_c519f2749ba14e8fb82c8e76b6c4244f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomuper/maxesetalal.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/barfi_full_movie_online_free.pdfIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_64bd3890315d4cf7adcb23acf3e58677.pdf?index=trueIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_fb391c6069b94791b3415f2c28ee2159.pdf?index=trueIn PDF document text
    • http://nekerudiwe.rf.gd/mathematics_syllabus_d_book_4.pdfIn PDF document text
    • https://03a45e23-20c9-4b13-8d21-50c2609e56df.filesusr.com/ugd/502f3d_2d9e547bcddd45869bda042ddd34b770.pdf?index=trueIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_48d6cdad3d304c8cb534a9440ff2293e.pdf?index=trueIn PDF document text
    • http://pabizazixivak.epizy.com/94904023912.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/how_to_know_if_someone_have_ocd.pdfIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_c5e988f5537f4bf7b4f989577b1a3034.pdf?index=trueIn 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_off0000fb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 5740 bytes
SHA-256: ed0eb63bd70c5b9787e4702bb330ed960197a39352a0650b2698d0661882fba7
font_01_sfnt_off00010f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F12 10972 bytes
SHA-256: 459cccf555880991f7d8a0256221ea84ca1f1c6b5ddae92ff5d5a6f1ac75493e

Open this report in the interactive analyzer, or submit your own file for analysis.