Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f756f84f8c5d4d…

MALICIOUS

PDF

76.9 KB Created: 2021-04-15 07:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bea72d7ae2b955e6fa0b309779fec996 SHA-1: 219c12fe3929857f179f9cf88d7dad9f7e070d0d SHA-256: 32f756f84f8c5d4de2f5b01781a865a10dbaac2957891e14bc9a2fece40351c1
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and redirector infrastructure, indicating a link farm designed to lead users to malicious sites. Heuristics indicate the PDF is a malicious redirector and a link farm, with ClamAV detecting it as Pdf.Phishing.Trojan. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute malware or phish for credentials.

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
  • 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://crophysi.ru/strik?utm_term=what+chords+should+i+learn+first In PDF document text
    • https://nazoturifebigik.weebly.com/uploads/1/3/1/6/131606271/pigabifu.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/jdijAhe/block_fight_on_street_outlaws.pdfIn PDF document text
    • https://lijafaxad.weebly.com/uploads/1/3/5/9/135989690/8814043.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/6eecbd3e33bea8c.pdfIn PDF document text
    • http://pibalefiw.22web.org/birds_of_prey_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/wogirujut/gigd7eW/pumif.pdfIn PDF document text
    • https://kemovovem.weebly.com/uploads/1/3/1/4/131408999/wujanakebuvig_xomigenejolal.pdfIn PDF document text
    • http://zakazuvanadoze.66ghz.com/zidaditogulosotalizinata.pdfIn PDF document text
    • https://demutarovawo.weebly.com/uploads/1/3/3/9/133997894/8550683.pdfIn PDF document text
    • https://xapugugividus.weebly.com/uploads/1/3/5/2/135298581/8843339.pdfIn PDF document text
    • https://kenolafopufa.weebly.com/uploads/1/3/4/5/134528829/sagajilu.pdfIn PDF document text
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/bijinisibopa.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/5543005.pdfIn PDF document text
    • https://cdn.sqhk.co/tititafoza/gdigw0M/she_wants_me_dead_mp3_free_download.pdfIn PDF document text
    • https://xesukalo.weebly.com/uploads/1/3/5/3/135311970/ab695fffa53b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidovug.rf.gd/orpheus_and_eurydice_opera_met.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/31297159483.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/99937297222.pdfIn PDF document text
    • http://zifunugol.epizy.com/vuzapate.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/93285092823.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/73891652122.pdfIn PDF document text
    • http://livijakowoleb.rf.gd/61787627902.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_off0000f0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 5124 bytes
SHA-256: 77aab25d4104aa010a4439effd0a6cb7a7fd669620b1fc1f4ed8694cd288dc25
font_01_sfnt_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 10476 bytes
SHA-256: f7697710284f01fd0dddddc9f901972f4c0c1342fb1bbdea23b273d18a9b1bfb