Malicious PDF — malware analysis report

Static analysis result for SHA-256 be698129e5c1531e…

MALICIOUS

PDF

82.3 KB Created: 2021-04-04 02:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3376a2e3ca9c7aa9d8a62ca3b80b03cd SHA-1: 0d3d43d0f030d2c7cb3b9c94d19a7af843da632b SHA-256: be698129e5c1531e751fa1678ac5c59a581e1ae9d442ab60683919e2e2cbeae0
226 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a "Password-protected archive handoff" heuristic suggests the document is intended to trick the user into downloading and then decrypting a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://xezojetit.ru/strik?utm_term=jvc+kw-r910bt+factory+reset PDF link annotation
    • http://makamar.xyz/tegisunudovekiletumev9cpaa.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/obc_caste_certificate_application_form.pdfIn PDF document text
    • https://xibemorebag.weebly.com/uploads/1/3/4/3/134355918/4bcc3bc389.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/bf00a6ce7a6.pdfIn PDF document text
    • https://sogutujugaj.weebly.com/uploads/1/3/4/4/134403955/fexatemat-gifedigepoxamuf-wivatonuniwedi.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/novelutiger_wofafubuvoxavo.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/9729360.pdfIn PDF document text
    • http://kleomaften.online/ladies_suit_cutting_pattern_imagesnys2p.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/5706496809.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/9015808319ce.pdfIn PDF document text
    • https://rotafejejulivis.weebly.com/uploads/1/3/4/5/134599198/tamokagulexak.pdfIn PDF document text
    • http://hydra.moscow/verutisutifosuniwowufunky6kx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca2fb97-7d15-40cf-9e64-e0d67a73a7b2/xiwisugiwin.pdfIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_2f1d560a1d1e4fd2aa5007cfd83b10c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb3d6e0-5f7d-45d5-9d54-92357cdcc5c9/vitokirixotugog.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/adendorff_tools_catalogue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ed0e713-719e-4221-9910-b748fb2b8512/black_and_decker_grass_hog_string_trimmer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52021be3-bd84-45d8-ba1f-f1006af3adc0/what_is_bio_in_greek.pdfIn PDF document text
    • https://40c507a3-37b7-491f-afd3-f28ba3af1fb2.filesusr.com/ugd/7f5264_f93a913d8b6d45ab8c9f16f3d7afdcef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d1b2acf-d5b4-49e1-804e-1749efe3f836/cuisinart_toa-60_air_fryer_toaster_oven_black_friday.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_off0001037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 5672 bytes
SHA-256: c2215905f2640926ec5ee9a2571366c565b97a2f16b1ee2de3151f9c1434bc60
font_01_sfnt_off00011702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11702 10848 bytes
SHA-256: 579cea1733a030237bfb5f322f2dea866c1cc5a16f8a478c40219f0bf1848e2f