Malicious PDF — malware analysis report

Static analysis result for SHA-256 005f7155bc3648ac…

MALICIOUS

PDF

43.9 KB Created: 2020-09-17 12:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 013a6d6ca3d122a95549dd0f3f81dd77 SHA-1: b765c71ba43f841265ee61da9ffd8299daed83d4 SHA-256: 005f7155bc3648ac7d40e04bbe4f0f18118eb0b7d7b64d8bb4178d33f538b6f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a mass of external links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Whatsapp app apk mod', suggesting a lure to download potentially malicious software. The presence of numerous PDF links indicates a link farm designed to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wix?keyword=whatsapp+app+apk+mod
    • http://garikegi.dililimo.net/uploads/1/3/0/7/130776054/aad149d859cf.pdf
    • http://files.witchpathforward.com/uploads/1/3/1/6/131637271/2136555.pdf
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.pdf
    • http://files.costaricaherbalmedicine.com/uploads/1/3/0/7/130738548/4325740.pdf
    • http://files.westharlemec.org/uploads/1/3/0/7/130775021/notogaw.pdf
    • http://files.vmartfilipinostore.com/uploads/1/3/1/3/131381553/totebom_wumizeduzel.pdf
    • http://ranuv.nwadventureguides.com/uploads/1/3/2/7/132712615/tatufomigemaporoxile.pdf
    • http://files.ejdilleyphotography.com/uploads/1/3/2/6/132683328/678639.pdf
    • http://labinuk.bravodancefamily.com/uploads/1/3/0/8/130813325/34e85c667f7c6.pdf
    • http://files.ourblessedbulldogs.com/uploads/1/3/1/3/131383763/tivufow.pdf
    • http://files.samanthaleal.com/uploads/1/3/1/3/131398406/8687339.pdf
    • http://files.lilibelleliang.com/uploads/1/3/2/6/132695306/858139.pdf
    • http://files.myrtle-beach-speeding-ticket-lawyer.com/uploads/1/3/0/7/130740053/fbcaaeeb098.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://eae1e092-860b-4d2a-af3f-d2e06c8e9ab1.filesusr.com/ugd/d4579c_b25431c6bbb24ec0b4ad1fda89b0d00a.pdf?index=true
    • https://e17f5789-6ae9-4786-aaf6-fa097d852c79.filesusr.com/ugd/3ce946_2780c4da48864bf0aefb185a4edef290.pdf?index=true
    • https://bb9c8ac2-b423-422e-9786-0fda04e58434.filesusr.com/ugd/7ff653_d8af1962aa804db7b7d5939b691745ca.pdf?index=true
    • 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_off00006562.bin
499f03db59444e5d77429dc7998e9a939c6d8bc9ef836629c466490ecde789c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6562 5148 bytes
font_01_sfnt_off000076cf.bin
4aa43d2ae1b927af7e6e01c7d6d63c5801435a62243d720357b35596799ba3f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CF 13884 bytes

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