Malicious PDF — malware analysis report

Static analysis result for SHA-256 95057eb91291819f…

MALICIOUS

PDF

80.8 KB Created: 2021-02-20 14:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ae0a5650ef79d5f59c9483d86f3375c1 SHA-1: 448a1619f815250c7d9a3c7cb5b24a7702ca34fb SHA-256: 95057eb91291819f2cfa3cc3790e86acf13ca0145e5361476a43c63812b5e0a6
186 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as a link farm containing numerous external URLs, with a high ML classifier score and ClamAV detection indicating malicious intent. The presence of many links on disposable hosting suggests an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, indicating it was likely generated programmatically to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=putting+9+lemons+in+a+bowl PDF link annotation
    • https://cdn.sqhk.co/xagogudexo/epjbV9S/xudurupivepufexojiwateluw.pdfIn PDF document text
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/9379901.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/igjas43/jugotawasobefo.pdfIn PDF document text
    • https://fekazivijiwawad.weebly.com/uploads/1/3/4/6/134687088/2468128.pdfIn PDF document text
    • https://lisufijefe.weebly.com/uploads/1/3/2/7/132740260/wufipasizuleg.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/Ujahixe/27745851920.pdfIn PDF document text
    • https://cdn.sqhk.co/lomokubaf/sagjjev/63345874378.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/jitonelutir-giwomijopu-rifaz.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwoxegolewa/heuIgfc/rebel_inc_mod_apk_happymod.pdfIn PDF document text
    • https://cdn.sqhk.co/rodisukipi/lhepvha/age_of_war_2_hacked_unblocked_games_77.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/jaiigdq/80833366157.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/ljjid1T/girefomesuravisusagufis.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
    • http://zefirowiruluko.rf.gd/gilijidutix.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/amrit_maan_difference_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/punekunesajateviko.pdfIn PDF document text
    • http://dosatetirudipu.epizy.com/extra_deep_fitted_sheets_king_size_bed.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/50852636642.pdfIn PDF document text
    • http://repafow.epizy.com/96542365867.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/bollywood_movies_new_full_hd_free.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_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 5180 bytes
SHA-256: 8b20e9cce5dbe9a48c5dd56aa29d56c8204cca96330bdbf717c873b241a39d7b
font_01_sfnt_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 10240 bytes
SHA-256: 872c044d1b0a547c252dd10315cef471bd7a888108b31762442d0cd7d645d8c1
font_02_sfnt_off0001275f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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