Malicious PDF — malware analysis report

Static analysis result for SHA-256 372565226791330e…

MALICIOUS

PDF

70.0 KB Created: 2021-01-30 12:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1c4c38c305172c6f6cbc0152315919c4 SHA-1: 261cb255bf923a4c332defd9ed196f884fe193e2 SHA-256: 372565226791330e427d354e012dbde4e84d93f6afcebb884707de68b49a37f9
254 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
  • 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.
  • 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.
  • 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/aws?utm_term=reporting+degrees+of+freedom+two+way+anova In PDF document text
    • https://valutakawewa.weebly.com/uploads/1/3/1/3/131378791/1044448.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/e18764fba95e0f.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/c580ef12.pdfIn PDF document text
    • https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/divujitu-nopedesotisani.pdfIn PDF document text
    • https://zogazipo.weebly.com/uploads/1/3/2/3/132303407/valowukeb.pdfIn PDF document text
    • https://kaxuzemerufo.weebly.com/uploads/1/3/0/7/130775382/93d035.pdfIn PDF document text
    • https://susominen.weebly.com/uploads/1/3/4/7/134714937/5c6124137df6.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/seligomumogazubad.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/bicghgd/70372482618.pdfIn PDF document text
    • https://fagojature.weebly.com/uploads/1/3/3/9/133987822/4607291.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/xebuvuwov/setodezivazadenu.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/neurofibromatosis_tipo_1_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/building_drawing_ioe.pdfIn PDF document text
    • http://bameromaxaw.epizy.com/22813865453.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/60742043401.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_off0000d535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD535 5588 bytes
SHA-256: 28f4d01261c67baea2975eecbe65db63aae53302e439de08cebf3e504639a8be
font_01_sfnt_off0000e84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84F 10164 bytes
SHA-256: 1024efc2b80cba643616e6d6918d4f5b1635d8fd612f00c22ad010ccc3de8bca

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