Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0082fa2401ff661…

MALICIOUS

PDF

83.0 KB Created: 2021-03-28 14:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a36edf71b7e5fdabca761c082170f5ae SHA-1: e31a04bbda1f09688a53eb016e34325b35157374 SHA-256: f0082fa2401ff661ef98c0a35de0c7311f4b095531738278bcfcdb362c74702b
156 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent URL pointing to a potential phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious content, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=marketing+action+plan+example+pdf
    • https://nofixemi.weebly.com/uploads/1/3/6/0/136082439/8c85e59.pdf
    • https://wadonado.weebly.com/uploads/1/3/4/6/134677460/3fbed3.pdf
    • https://cdn.sqhk.co/jipodipotaj/hg5jbhd/nulozojuzekekasakikaja.pdf
    • https://cdn-cms.f-static.net/uploads/4404290/normal_603d833741931.pdf
    • http://trysoda.club/hp_laserjet_m1212nf_mfp_price_south_africaewk3z.pdf
    • http://save50.pro/3d_pie_chart_template_excelcsm0t.pdf
    • https://cdn.sqhk.co/wamitavixitu/fVhaPhi/dungeon_quest_excalibur.pdf
    • https://dufeduvu.weebly.com/uploads/1/3/4/4/134481569/purigi.pdf
    • https://cdn.sqhk.co/siripeka/jihcGhe/zezofajutusudimenifig.pdf
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/xafixelupu-tubugideduv.pdf
    • https://cdn.sqhk.co/minofavazu/P2jiaII/nixefavuguwixulaku.pdf
    • https://static.s123-cdn-static.com/uploads/4479236/normal_5ff4e2f92c111.pdf
    • https://cdn.sqhk.co/kososojog/jeggjfP/tank_arcade_shoot_em_ups_android.pdf
    • http://in-step.shop/nordictrack_c2255_specsjvi8g.pdf
    • https://masarifixi.weebly.com/uploads/1/3/4/4/134486171/muzovixupojazigatu.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dinazodes.rf.gd/27943077785.pdf
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_d1b77912c69c4e84abf7a933e844daa0.pdf?index=true
    • http://xovebezot.rf.gd/fesurumimoloruxebaso.pdf
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_fc3c74d410a349698553c3b7e4000fec.pdf?index=true
    • http://nawevuf.epizy.com/28451629282.pdf
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_d2a7321978044f2cadf08c448eb2e721.pdf?index=true
    • http://bolusober.epizy.com/how_alliances_lead_to_ww1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb12.bin
aed56168b8f777e3f5f294ba25b9e228496220a8f54757da94b5386a356345d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB12 5220 bytes
font_01_sfnt_off00010cc7.bin
17602be7732f3a751576087801de5fb4824010861de17c91d3654730d1968d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 10340 bytes
font_02_sfnt_off00013044.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13044 4324 bytes

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