Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc43887e2091301…

MALICIOUS

PDF

61.1 KB Created: 2021-02-09 21:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 05c952ae1822dc9d3e7fac999f183ea5 SHA-1: ba8249ee9703e0b430e97cd8d4d5130cb98dd42b SHA-256: 1fc43887e209130171e45271b292edff015d41f0645293314bdef5f9b9c75503
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/123?utm_term=cannon+basketball+unblocked PDF link annotation
    • http://mosdendy.store/mufokironupi0bmmo.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/xewopod.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/id1jgji/sky_force_3_4_grey_fog_resell.pdfIn PDF document text
    • http://yourbigdick.space/kivizeramu2bjn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paritoxo.rf.gd/vancouver_canucks_schedule_2018-_19.pdfIn PDF document text
    • http://jowuwivipi.rf.gd/excel_dashboard_examples_and_template_files.pdfIn PDF document text
    • http://sanebofav.epizy.com/rodes.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/bimogubukesav.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/45896174719.pdfIn PDF document text
    • http://ruwabegaxiz.epizy.com/79968047194.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/xuruked.pdfIn PDF document text
    • http://pususarejopo.epizy.com/michelin_star_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/57322846957.pdfIn PDF document text
    • http://minirulo.epizy.com/pcsx2_windows_10_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/fremennik_exiles_quest_guide.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_off0000b471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB471 4948 bytes
SHA-256: ae10080d8b1074e22ed7e6d96dd6ab05aeb3c2a79809c26a5beae20a14f9fe41
font_01_sfnt_off0000c550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC550 10072 bytes
SHA-256: 58c95f2dd31b24d8f232f69e2ee5ed08ff801e10feb2c5beef7a7fa0fba2a116