Malicious PDF — malware analysis report

Static analysis result for SHA-256 156c72b64448c18f…

MALICIOUS

PDF

42.8 KB Created: 2020-11-01 23:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a99b01017c0932077ec082d83d399063 SHA-1: d88e868dace708fc4310e1a752571e0ed9935cfb SHA-256: 156c72b64448c18ffdce08d5c9cd2b1f5ddbfcebe8cc869ff067cdf441580c5a
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF document contains embedded links that redirect to a malicious URL, identified as a lure for credential harvesting. The heuristic 'SE_MFA_LURE' strongly suggests the intent is to trick users into providing sensitive information, likely through a phishing page hosted at the redirected URL. The ML classifier also flagged this PDF with high confidence.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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://ttraff.me/123?keyword=coc+hack+tool In PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/zuvatulukanimumuwod.pdfIn PDF document text
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/kataxegijaxagexuju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_5f9eb20e1844d.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/2d1905abc62e2a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f9ec04447b5d.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/tijisozakure_kifimazufafi.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/3057652.pdfIn PDF document text
    • https://seboneluwisog.weebly.com/uploads/1/3/4/3/134368334/356112eda7522.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/1cb9894be10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad512bad-c3ee-4ecc-8497-7ba12462e931/zabinej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1b76d1-8f72-4a28-9ecc-6d224df2b081/78150748531.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/what_is_r3_zoning_in_charlotte_nc.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/la_luna_sangre_august_9.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_off00006ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADE 4584 bytes
SHA-256: db2659063382da1f283ac882e0b46def8cf35da58b200255d3aa33b66b58a519
font_01_sfnt_off00007a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A70 10600 bytes
SHA-256: 87175ecc67d804a8094685fe0aecf3e75d228285c3e12dd43e2b66bcaf7047f2

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