Malicious PDF — malware analysis report

Static analysis result for SHA-256 373e0d983d69f723…

MALICIOUS

PDF

105.4 KB Created: 2021-02-26 16:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: fb574eaa5d56e362c9516404e142652b SHA-1: 579dee981c02dfc7fa18e5805b44793221cd47c9 SHA-256: 373e0d983d69f7235ba28d69600c079a26e63e8920cfee11298f9c0ab111aecb
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains or link farms, indicating a phishing or spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

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
  • 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://pelibifir.ru/award?keyword=how+to+play+romeo+and+juliet+dire+straits+youtube PDF link annotation
    • https://cdn.sqhk.co/golomamone/SXjg0xR/african_hair_braiding_salon_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/fopikudapom/bHgfiij/98142087814.pdfIn PDF document text
    • http://kupugula.iblogger.org/hardware_and_software_specification_template.pdfIn PDF document text
    • https://vokefepafox.weebly.com/uploads/1/3/4/3/134333292/fibaxod_marelezel_bafamajate.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/igLjgnQ/gas_prices_in_california_2009.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/wiju4ha/mcat_practice_test_questions.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/heisig_kanji_listhcgcb.pdfIn PDF document text
    • https://lefitujeledezov.weebly.com/uploads/1/3/6/0/136028835/1380954.pdfIn PDF document text
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/6022696.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/ihfivja/fatal_raid_apk_data_download.pdfIn PDF document text
    • https://kidupexedu.weebly.com/uploads/1/3/4/6/134683121/bekepede.pdfIn PDF document text
    • http://onlinesos.tech/maxenupotapekaocq.pdfIn PDF document text
    • https://nujawarasut.weebly.com/uploads/1/3/4/3/134310583/95e196f96.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/XhegfLh/screen_recorder_android_without_watermark.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zixoxajoredipub.epizy.com/15869591286.pdfIn PDF document text
    • http://sukidagijonola.rf.gd/the_iron_kingdom_barnsley.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12406 12384 bytes
SHA-256: 7db5ea4fe2f9011664978577335559afdddb0c9f415d62773a5312490a568417
font_01_sfnt_off00014c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C29 5476 bytes
SHA-256: 6e0ae5d339a81ae626ab3521d0078a9fb5530cc4e96d630877a9bc8fddeac47b
font_02_sfnt_off00015ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EC2 20296 bytes
SHA-256: d2c485510f129eb2620870286d4d250fa7b706fb7d55b3a5799b5f6c74113bb1

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