Malicious PDF — malware analysis report

Static analysis result for SHA-256 8340c70ac1c6deac…

MALICIOUS

PDF

77.6 KB Created: 2021-02-05 08:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ec31e4a9d32a07f12673d63a83d78c99 SHA-1: ed1008af4eff26517c78144f2b4a280fb5b8e36a SHA-256: 8340c70ac1c6deac585b5eac08f012b62e2be13726f8ae324e571646fb3779b0
196 Risk Score

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.
  • 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://bologen.ru/aws?utm_term=cisco+2960+configuration+guide PDF link annotation
    • http://ulekschool.online/todawakukeveju490j.pdfIn PDF document text
    • https://gisafonenum.weebly.com/uploads/1/3/5/3/135323636/bixadusuxuk_juwuzakuz_kosigenagitotob_keniw.pdfIn PDF document text
    • http://techanomic.com/basic_ielts_listeningc1zm3.pdfIn PDF document text
    • https://vumopofusub.weebly.com/uploads/1/3/0/8/130874587/77655.pdfIn PDF document text
    • https://cdn.sqhk.co/vefobinibe/jeicdB2/63803941419.pdfIn PDF document text
    • https://xevujudibibabus.weebly.com/uploads/1/3/4/5/134599482/7843931.pdfIn PDF document text
    • https://wajotirege.weebly.com/uploads/1/3/5/3/135306859/fododok-temij.pdfIn PDF document text
    • http://mastericy-chistoty.ru/beaulieu_park_primary_school_uniforma3aad.pdfIn PDF document text
    • https://zesujixiti.weebly.com/uploads/1/3/1/3/131398447/gupirozenadu.pdfIn PDF document text
    • https://vasetovomakoti.weebly.com/uploads/1/3/2/7/132741031/gamujuwovokifosuti.pdfIn PDF document text
    • https://jonolepazom.weebly.com/uploads/1/3/4/5/134520471/vimebidugek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xopugup/tigalin.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/chipping_campden_school_uniform_alcester.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/87652185746.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/pigewejakena.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_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 5648 bytes
SHA-256: 8c5c0d33b2e66076e35780457caa562e435bf1dfc7c5c3a1d9756d52a8c08655
font_01_sfnt_off00010374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10374 11328 bytes
SHA-256: 2faeb4514a0089e2a761a6269590bc2f0d79aa902f65bab9f5ec4106386cb458