Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c11bea502641c6…

MALICIOUS

PDF

36.3 KB Created: 2020-11-03 06:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 99b04c0bddc047d7c5e35815d070cb02 SHA-1: 27dc829f68b38536c0bdd92d9eccb403fee77a65 SHA-256: f5c11bea502641c6637ed0acd5c46ba118342253546956db3888d6b08b0b3c1d
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it's a malicious redirector and a brand-impersonation credential phishing lure for Amazon. It links to a redirector URL, https://cctraff.ru/123?keyword=ambient+weather+adventurer+radio+manual, which is likely used to host or distribute further malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://mibebedobosuv.weebly.com/uploads/1/3/4/3/134322580/3383692.pdf.
  • 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://cctraff.ru/123?keyword=ambient+weather+adventurer+radio+manual In PDF document text
    • https://mibebedobosuv.weebly.com/uploads/1/3/4/3/134322580/3383692.pdfIn PDF document text
    • https://velizixevapejaj.weebly.com/uploads/1/3/4/3/134376636/76ccf872347a.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/8203106514ac.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/ac9149829f3.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/muxotevebuvogo.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/fuwawibu/58157622676.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/balanced_scorecard_in_ethiopia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487f2dd2-b734-4fbb-81d9-9ad6a2c95fdd/ramowadogenifititakufiv.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/lionel_transformer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/gagiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/42370759276.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/happy_wheels_un.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/41831043600.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/truity_credit_union_online_banking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45fdd06b-59a5-4971-b9f4-bfe27d1e7c3d/2795124738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626aff7a-a293-4cdd-a93f-67bbae0f75f6/twenty_one_pilots_stressed_out_parol.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C23 5168 bytes
SHA-256: 27396dad35831225b03cdd0294bb24a7f8b7a6bd66cd8151c3b50da296e3ff42
font_01_sfnt_off00005d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9C 11404 bytes
SHA-256: ee0f22def732a38ad3efa49e4a08d886d350a0818f0f5d9a68df7ff489c1ee21

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