Malicious PDF — malware analysis report

Static analysis result for SHA-256 224bce9cc32ff29d…

MALICIOUS

PDF

78.4 KB Created: 2021-02-25 16:37:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0d7242ca6516cccff7749188d1170c31 SHA-1: bf7209ed12eb455bc7ec0d16841fa48b3c2b1fc2 SHA-256: 224bce9cc32ff29d31ee3ad95f4a42ac6c1a01352f22b8a14df48d5164b0643d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a link farm. The ML classifier and ClamAV heuristic firings strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded URLs point to various domains, suggesting a broad distribution or redirection strategy.

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://maypoin.ru/wix?keyword=baby+animal+names+worksheet+baby+shower PDF link annotation
    • http://electorat.org/14509711596sxjoy.pdfIn PDF document text
    • http://podeves.xyz/3776782152agtjd.pdfIn PDF document text
    • https://xevekefipozi.weebly.com/uploads/1/3/1/4/131406281/906743de.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/zuduwirizepumi-dagijido-lokusumuxumuse-sarolituzurora.pdfIn PDF document text
    • http://petersikdar.com/xotosejigirolujanatave8mluw.pdfIn PDF document text
    • http://bestunew.xyz/99569054080nu5ft.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/df9bb.pdfIn PDF document text
    • https://govubazidexifa.weebly.com/uploads/1/3/4/3/134342639/zujerelotobowezuja.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/why_do_smoke_alarms_go_off_in_middle_of_night.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/xilezepe.pdfIn PDF document text
    • http://gnatural.space/chikoo_information_in_marathimowh4.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/lowrance_hook_3x_dsi_review.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/63828636674.pdfIn PDF document text
    • http://biluber.22web.org/lesegisuduwelajimupovapo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bekelogamaju.rf.gd/26349484376.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/90313599512.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_off0000f597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF597 5372 bytes
SHA-256: 7a09b6e6632ce4d5ca99b586f684bbefa8da6b335861681557994b15d8207db9
font_01_sfnt_off000107c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C4 10792 bytes
SHA-256: 065abb8e435a8af1a867b67a1190ff884053a2033b6a7eea7fc0357b4b7aabc0

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