Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe3832e7ef13681…

MALICIOUS

PDF

69.5 KB Created: 2021-05-05 22:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 942a5897d2fb8646d53115eb413b5100 SHA-1: 4d0a868ff74e804f64a3a67a8fde9607526cf366 SHA-256: 1fe3832e7ef13681eab0774b88ec7defb3e2806ed9327f401383af988247915a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, indicating it is part of a link farm designed to direct users to potentially malicious websites. The primary URL identified is https://pelibifir.ru/wb?keyword=pomona%20mini%20banana%20plug, which appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/wb?keyword=pomona%20mini%20banana%20plug
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/wegaxeragemi-fopexe.pdf
    • https://mafadojidakiwo.weebly.com/uploads/1/3/1/8/131871721/8762994.pdf
    • https://cdn.sqhk.co/vasegodesazu/5gjUiiX/38130771656.pdf
    • https://wupibivuvofat.weebly.com/uploads/1/3/1/1/131164023/mexajamowudavotudel.pdf
    • https://giwedogifuj.weebly.com/uploads/1/3/4/7/134741463/wujafi.pdf
    • https://cdn.sqhk.co/sudidoxa/ajgibGC/baixar_jogo_dalmax_damas_apk.pdf
    • https://cdn.sqhk.co/lapitobexeva/j5gdgcl/batman_the_telltale_series_android_system_requirements.pdf
    • https://kumapeforurimo.weebly.com/uploads/1/3/4/6/134664671/varolagetixiniw.pdf
    • https://cdn.sqhk.co/gojikanemiju/MdjjjjC/12576560733.pdf
    • https://cdn.sqhk.co/madilaxetevo/jfhdjeQ/extreme_car_driving_simulator_hacked_version_apk_download.pdf
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/pewejisowo.pdf
    • https://wowajonaj.weebly.com/uploads/1/3/4/7/134717857/gexapuju.pdf
    • https://cdn.sqhk.co/matezafun/Ljcbgc4/free_wallpaper_and_ringtones_for_iphone.pdf
    • https://bupulaserora.weebly.com/uploads/1/3/1/4/131437689/midadavogeni.pdf
    • http://dizurexemubegog.mygamesonline.org/selenium_interview_questions.pdf
    • https://cdn.sqhk.co/jivuzukop/ghgctIH/fafurejinasajojixukusib.pdf
    • http://dosefokinuvulo.mypressonline.com/technical_analysis_nse.pdf
    • https://nirotobilimob.weebly.com/uploads/1/3/4/4/134484477/9902432.pdf
    • https://fozijiruzixusap.weebly.com/uploads/1/3/4/3/134317533/biradoxikarasu.pdf
    • http://wimesuzajomos.mypressonline.com/43479620581.pdf
    • https://damasidegiked.weebly.com/uploads/1/3/1/4/131411688/1334749.pdf
    • https://vijibasotaxeja.weebly.com/uploads/1/3/5/9/135990507/padevazexidonoxokem.pdf
    • https://cdn.sqhk.co/suxavawudomo/die3ggi/fasebugasojegawamut.pdf
    • https://fapurexetekuwud.weebly.com/uploads/1/3/4/5/134508670/xopulupa-zafad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fazegujopazoj.atwebpages.com/80931147485.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d439.bin
29fa846bc038e256b3437cd023b89350fbf1cd1cbd06f4f75307170153259040
pdf-font-stream PDF embedded font (sfnt) at offset 0xD439 5008 bytes
font_01_sfnt_off0000e52e.bin
1eb759ad787c1a3f981bc955525006c5e4e41a557385378583f6cad4db7352f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 10360 bytes