Malicious PDF — malware analysis report

Static analysis result for SHA-256 6919d6daf4bbb469…

MALICIOUS

PDF

102.6 KB Created: 2021-03-25 15:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8ccff6dcbe60f0c256e489784714a4a4 SHA-1: cd466fb5c7c169e54745f9e8fc22f0508091abfd SHA-256: 6919d6daf4bbb4693a351ad0d27460393809e116bed3f98373c77f34c4ee5f91
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://maypoin.ru/award?keyword=braham+kavach+path+pdf PDF link annotation
    • http://kiritisivasol.mywebcommunity.org/91444269626.pdfIn PDF document text
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/zufijaza-nimidenibet-kamugimenufek.pdfIn PDF document text
    • https://cdn.sqhk.co/gobisofokox/jggA4hi/tevudulas.pdfIn PDF document text
    • https://cdn.sqhk.co/zunowexafa/ihdghSw/download_stickman_dismounting_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/egeLJBl/80739253976.pdfIn PDF document text
    • http://cheapestshop.xyz/23727732085hvmx2.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/cMhappX/skyward_login_bisd._net.pdfIn PDF document text
    • http://alkim.xyz/america_the_story_of_us_part_1_rebels_answer_keyxfj20.pdfIn PDF document text
    • https://dixodenifafazud.weebly.com/uploads/1/3/1/8/131856669/kukoluresisem-wikojanunopiv.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/KLjjmji/ates_ve_su_buz_devri_2_oyun_skor.pdfIn PDF document text
    • https://sileperu.weebly.com/uploads/1/3/1/4/131406390/df0de5c2.pdfIn PDF document text
    • https://lizakefamejoxen.weebly.com/uploads/1/3/1/3/131384135/rebuperam_sijibozel.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/82667758054.pdfIn PDF document text
    • https://derovidexaw.weebly.com/uploads/1/3/1/3/131382126/mataka_numijaxatisil_rukalotidinufig.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/iege9q9/army_pt_uniform_regulation_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/datujisukebe/hffhiLs/new_super_mario_bros_2_mystery_adventures_pack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://pikaderobiw.atwebpages.com/losufa.pdfIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_e463528e9d3d400390fcf21660755124.pdf?index=trueIn PDF document text
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_d3a8f72d92844aad9a0564393f32ce87.pdf?index=trueIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_e5f87a9471a344fe9f8c295eb4b6e4b8.pdf?index=trueIn PDF document text
    • https://951e66c5-660f-4748-bfcc-a6cc0831133d.filesusr.com/ugd/4967bb_d8eeafcef9a54919be1c1b98f6addeed.pdf?index=trueIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_234f0cddb1ff42418ea2726858105d62.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001290a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290A 5360 bytes
SHA-256: 5fbf423156b5e95305521f35e992f4405d520ffb414156ae4ad4df503320398d
font_01_sfnt_off00013b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B20 3740 bytes
SHA-256: eb903a4bcabb0673128613fc2c6a3b3be6b6be0204d11159aa2f590e1d82ee93
font_02_sfnt_off00014699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14699 10708 bytes
SHA-256: 523d1b0583184cfdb524e52000fb2ceabaa8cdcbdb619da7c5b530ace073980c
font_03_sfnt_off00016815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16815 10592 bytes
SHA-256: 11843cd19454c8433a749c52fed6b8f6ee19bb038f1d8ff00b5df61eb5f93079