Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1b63ec81828cb2…

MALICIOUS

PDF

68.5 KB Created: 2021-01-29 03:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: cd78e3c4d31f5a7bff65dc6fa487575d SHA-1: f08fc4649af53ed4dc84c54260b9e39e4f76a4a2 SHA-256: bd1b63ec81828cb2e68bd4f9dc0b693859197bdef14e7360f5679338a565fa96
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=wallpaper+anime+love In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5fd133bbbcf04.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/f4221c0b03.pdfIn PDF document text
    • https://samaruwopag.weebly.com/uploads/1/3/0/7/130738554/4071799.pdfIn PDF document text
    • https://gevivakeje.weebly.com/uploads/1/3/0/7/130775257/lokobo_sukevametapef_tuxaxodoxevidit_zukibigarigupu.pdfIn PDF document text
    • http://toteganutiv.66ghz.com/transformers_5_bumblebee_death_scene.pdfIn PDF document text
    • https://muxuxinipizo.weebly.com/uploads/1/3/1/6/131637853/zixelur-befirafimata-ximazipato.pdfIn PDF document text
    • https://tumurotijom.weebly.com/uploads/1/3/4/5/134512141/835169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403936/normal_60119da99eac4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/asphalt_8_xtreme_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/lufadaboba.pdfIn PDF document text
    • http://wimoduwogukuruk.rf.gd/persona_5_skill_cards_guide.pdfIn PDF document text
    • http://zoribele.epizy.com/bairi_kangna_video_song.pdfIn PDF document text
    • http://firiveperoju.epizy.com/vevofigejikebotofisux.pdfIn PDF document text
    • http://tewapodu.rf.gd/assassin_s_creed_liberation_trainer.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/boomers_meme.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEE 4860 bytes
SHA-256: db3518ec3f162a3f6ac0b5e7edbffc63595f90e5866c43bd2535649245326978
font_01_sfnt_off0000dd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD70 14024 bytes
SHA-256: 59c63eb87acf1579795681fa01034abebd1804100a79edc1f38ddf291b63179d