Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97833cd59af1783…

MALICIOUS

PDF

74.6 KB Created: 2021-03-01 09:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e68ccdb77caaf348c622f112b12e16ef SHA-1: 320699f81d462ec77aeaae34361f15bef9b64081 SHA-256: d97833cd59af1783e136a87317c3e9878af00e2856249a94f1bfe80e0d637447
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary URL observed is https://seumenha.ru/strik?utm_term=howard+leight+impact+sport+bolt, which likely serves as the initial lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://seumenha.ru/strik?utm_term=howard+leight+impact+sport+bolt PDF link annotation
    • http://lofajemami.sportsontheweb.net/can_you_trade_binary_options_with_td_ameritrade.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/455586ba125.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/author_of_whos_afraid_of_virginia_woolf_crossword_clue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371812/normal_5ff6acfa89fc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386347/normal_6003d15129921.pdfIn PDF document text
    • https://xawajedub.weebly.com/uploads/1/3/4/8/134886715/c4018.pdfIn PDF document text
    • https://regamozinog.weebly.com/uploads/1/3/0/9/130969170/9b8fddbcef24a77.pdfIn PDF document text
    • https://fanakigefepawaf.weebly.com/uploads/1/3/0/8/130873796/tonujodewinu.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/how_to_install_humidity_controller.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/what_is_the_old_scofield_study_bible.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464739/normal_6035ab3183ff9.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/hoi4_black_ice_division_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393514/normal_5fef83becce03.pdfIn PDF document text
    • https://jomufoxubibad.weebly.com/uploads/1/3/1/1/131164047/kalijaru-bemididuj-pison.pdfIn PDF document text
    • https://nojufetabug.weebly.com/uploads/1/3/4/7/134748112/c0efb83fb7ad0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuropomap.epizy.com/endangered_species_free_worksheets.pdfIn PDF document text
    • http://zugosixefi.epizy.com/bomovegizefusifogowel.pdfIn PDF document text
    • http://penalat.rf.gd/6547031986.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE424 5680 bytes
SHA-256: 00dca2f46906b708849bda22bb2b7288e45ddb45d60f89376f7ae0738795690c
font_01_sfnt_off0000f74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74E 11292 bytes
SHA-256: 8beeec600ab6826fd4df4a6ea651a817e860eafce0f55233949c6392ff8b292a

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