Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ad47ab91910570…

MALICIOUS

PDF

77.7 KB Created: 2021-05-15 00:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 50484e812484865016a748d5af8b8dbe SHA-1: 27c90162c5f24ab184c743d377d7e32f13aba112 SHA-256: 37ad47ab91910570dfbe2f67a606077da75b8afa8f595ba668c979e26b6fc1d9
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of external URIs and a link farm heuristic strongly suggests the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=believing+god+beth+moore+session+2 PDF link annotation
    • http://leree6.club/how_to_set_a_woods_digital_timero9mm2.pdfIn PDF document text
    • http://parhelifrl.space/bosch_ra1171_compatible_routersnauzg.pdfIn PDF document text
    • https://pomulopegodetom.weebly.com/uploads/1/3/1/3/131384256/jevimawoduv.pdfIn PDF document text
    • http://leopards.space/holster_pattern3bnv3.pdfIn PDF document text
    • https://zexexidiwe.weebly.com/uploads/1/3/5/3/135330220/2661858.pdfIn PDF document text
    • https://cdn.sqhk.co/jizapamilizo/dv42ic2/47473604995.pdfIn PDF document text
    • https://sujuxeneme.weebly.com/uploads/1/3/1/3/131380470/2977019.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/dG7gcvI/wikegoxefijobawivofe.pdfIn PDF document text
    • http://ledy66.net/business_plan_for_a_coffee_shop_pptxuci7.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/hFgcgeq/54879653624.pdfIn PDF document text
    • http://agent-ritual495.online/olympus_om2n_user_manualrqjg4.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/fejfgc4/mabodezeneroful.pdfIn PDF document text
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/8c5e6eb08ead.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirijobadi/izpchjD/garou_mark_of_the_wolves_best_character.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/7hgohdF/bumidunorulu.pdfIn PDF document text
    • https://saxetesaw.weebly.com/uploads/1/3/5/3/135301220/zedupozonera-fonejefiropisu-vogevararo.pdfIn PDF document text
    • https://wabobileminila.weebly.com/uploads/1/3/5/4/135400898/3076675.pdfIn PDF document text
    • https://cdn.sqhk.co/dilujuzaga/otXhedX/usb_rechargeable_flashlight_with_magnet.pdfIn PDF document text
    • https://xufaxasevejanog.weebly.com/uploads/1/3/4/8/134886042/judovuxamexazo-bizevagilili-gusulagejotu.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/sezebepit/avast_secureline_vpn_license_file_2021_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/vujunaxosagakolepujevo.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/gopux.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_off0000ef7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 5412 bytes
SHA-256: a4ff8fbd447dc574383c7a7372593c550265b4449f955cdd47e780c609ce19fa
font_01_sfnt_off000101c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C0 11240 bytes
SHA-256: 1ef50020fa47b51194df490aa7cb7900d299d8df2096f8f48c7c01359589644c