Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be9b04441afa887…

MALICIOUS

PDF

74.6 KB Created: 2021-03-14 04:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f2875c264fd360bb05ebe557093b7da6 SHA-1: 22006a2e49e83fcc7c92351c97c7bc81773bd18c SHA-256: 8be9b04441afa8878651bbdf610de5ee2c14dc530041fba82afb4a6aa2328188
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and potentially malicious hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution vector, likely leveraging embedded JavaScript to facilitate redirection.

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://midufefew.ru/strik?utm_term=velocity+vs+time+graph+increasing+acceleration PDF link annotation
    • https://wefakibulebu.weebly.com/uploads/1/3/1/4/131408371/nojaxifuw.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/75782423485o55p1.pdfIn PDF document text
    • https://kawawipebezuvo.weebly.com/uploads/1/3/1/4/131409621/larazur.pdfIn PDF document text
    • https://xezitolisaja.weebly.com/uploads/1/3/1/4/131406502/1519465.pdfIn PDF document text
    • https://setekonireza.weebly.com/uploads/1/3/4/1/134131298/weribuguw-nisazat.pdfIn PDF document text
    • http://mangalvpodarok.ru/sky_above_mud_below_film64nqg.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/3hbidgh/gazilijulewubugijewim.pdfIn PDF document text
    • https://mubuxepuvu.weebly.com/uploads/1/3/1/3/131383429/3315968.pdfIn PDF document text
    • https://sosedegif.weebly.com/uploads/1/3/2/8/132815053/mavosukadomevimaxuko.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/tovenozalunu.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/ghegfnP/punutojanipezakopeto.pdfIn PDF document text
    • http://raisinshq.club/old_yeller_death_quote0a3pg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_9207ad718c284501a40da1fa6a2ef74a.pdf?index=trueIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_94fbf606610c46aa90ad19c1fc9924a0.pdf?index=trueIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_be45a1866c76414fb12175eefedf7ce8.pdf?index=trueIn PDF document text
    • http://xelinekevob.epizy.com/can_you_day_trade_stocks_in_a_roth_ira.pdfIn PDF document text
    • https://8860adff-7f0b-4cf3-a358-cdd560dff136.filesusr.com/ugd/625844_e3a941045c634c68953036051db842a4.pdf?index=trueIn PDF document text
    • http://ravexigulot.rf.gd/dirimir.pdfIn PDF document text
    • http://tosivasode.epizy.com/samsung_a8000_firmware.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_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 5472 bytes
SHA-256: e970fd7110843df81bd15a39f8a3f2ecd033843bec3b7f46aba97571feed9602
font_01_sfnt_off0000f7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AF 10884 bytes
SHA-256: 7488403fb857ba5685001d7c581a468adf32dd1575ddf2c23b80a75ebde33618

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