Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd7e08a5613f365…

MALICIOUS

PDF

85.6 KB Created: 2021-03-20 06:16:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 57fb2f5195a41c81724d322b3cc5c3ea SHA-1: b0afc3bb0d97046174beddc6b8893ae657f86d65 SHA-256: 4fd7e08a5613f3657c03527fe5b215e0919d4c44668b58a9258041a6cf559c0a
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://gimoguvi.ru/strik?utm_term=sony+sketch+font+free+download PDF link annotation
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/madikep_jepilarodezabar_pazuxukemade_sugoz.pdfIn PDF document text
    • https://zigajimimokok.weebly.com/uploads/1/3/1/3/131383588/8be72e6f.pdfIn PDF document text
    • http://allerlo.xyz/jaani_dushman_2002_full_movie_480p7hxar.pdfIn PDF document text
    • http://fherixq.com/fuzalizoxigitawokam2ycf.pdfIn PDF document text
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/7863536.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/jb7yhc5/warship_battle_app_download.pdfIn PDF document text
    • http://santaparker.store/5138098412755h5i.pdfIn PDF document text
    • http://electriccannoz.club/98794451975hqgr3.pdfIn PDF document text
    • http://fartook.online/16046642003l0ven.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/hivgeyb/arsenal_burnley_match_report.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/saniruwagedujafumobuwi7kuyr.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/z4AIKif/captions_for_photos_with_friends_funny.pdfIn PDF document text
    • http://wgathering.org/gipolofuxebuzazb40lm.pdfIn PDF document text
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/butokubodonuguvu.pdfIn PDF document text
    • https://rilewinip.weebly.com/uploads/1/3/5/9/135964764/gajal.pdfIn PDF document text
    • http://heretythere.site/our_endless_numbered_days_lyricsn824q.pdfIn PDF document text
    • https://cdn.sqhk.co/doxutijewu/eQhhH1I/live_streaming_app_for_android.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://s3.amazonaws.com/jivuxo/kotlin_syntax_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/68149906465.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_2f3d5f2bf2b0418491a36356be2c50d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/one_minute_manager_series.pdfIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_d5e1c4d500294869be557c6320db4523.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/zabofesumoxif.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_1cfce8b0f1574958ac34f082d3cd27c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/thermal_label_maker_reviews.pdfIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_fcda3932da8d409289a1f3e9900ca200.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE754 5212 bytes
SHA-256: e5ef8b75b8637d99083a13b90f1cf790eb55bea858228778a9e5dac778ec8e0b
font_01_sfnt_off0000f916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 13100 bytes
SHA-256: 6f3bbc9d10a679f1b0ecc40ec12f833eac394b4782687c5cd57f85e91ac6337d
font_02_sfnt_off000124b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B8 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off000139e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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