Malicious PDF — malware analysis report

Static analysis result for SHA-256 186eba71723d86c6…

MALICIOUS

PDF

43.3 KB Created: 2020-08-15 03:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 660646232aaf1cfb07b1ac15113e23d3 SHA-1: 700c4c0566884d5a8ae1b0a44c5d52ab44dc3402 SHA-256: 186eba71723d86c6035c40470b608ee4c788d61af5f692f04a84150264fc5841
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector to malicious infrastructure, indicating an attempt to lead the user to a malicious download or exploit. The document body, though heavily obfuscated, contains the same malicious URL found in the heuristics, suggesting a social engineering lure for movie downloads. No scripts were extracted, but the PDF structure and linked URLs strongly suggest a malicious redirector pattern.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=khiladi%2528+2013+bengali+movie+video+songs
    • http://files.divinehorsetack.com/uploads/1/3/0/7/130775297/gozagas.pdf
    • http://files.francelettekindnessadventure.com/uploads/1/3/1/3/131382030/97bf3d.pdf
    • http://files.ericbroadvet.com/uploads/1/3/2/6/132695351/4971761.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0062/7363/files/wodigofutuleliromomeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/favulusurozosegarevis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7384/6952/files/piscicultura_familiar_no_amazonas.pdf
    • https://cdn.shopify.com/s/files/1/0432/4491/2802/files/zozemekijikozesiguv.pdf
    • https://cdn.shopify.com/s/files/1/0432/6830/9152/files/cc_cleaner_pro_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/precalculus_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/zekibalilosaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9612/1251/files/82515815607.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/jakapedigen.pdf
    • https://cdn.shopify.com/s/files/1/0448/5827/8050/files/add_text_to_in_adobe_acrobat_pro.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/medezaxuxusurun.pdf
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/66519652929.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006843.bin
047b56759f5732048db56025a397d82972ca7bf55afc13a725711bc4a1273b9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6843 5880 bytes
font_01_sfnt_off00007c2f.bin
0ba38941f392709ed98744e8c87d6cd13d2cbac97f2d8eebd96fe249c8c0473d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2F 10572 bytes

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