Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfb5260964bf31e…

MALICIOUS

PDF

59.3 KB Created: 2020-08-13 22:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edb8f5d1ffc63aa2285610d2b5be40d9 SHA-1: d6a416c2110e593e5279087d07ef2989f74cc8bb SHA-256: 0bfb5260964bf31e1cd88ee54aed8f8ad3495ab53d20728713679cf5498c75cb
194 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'job card' and includes numerous links, many pointing to external PDF files, suggesting a link farm or redirection strategy. One critical heuristic identified the primary link as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's structure and content align with an advance-fee scam, aiming to trick users into clicking malicious links.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=job+card+ka+full+form
    • http://naxob.bristolparenting.com/uploads/1/3/2/6/132680813/8919162.pdf
    • http://files.whatson-mg.co.uk/uploads/1/3/2/6/132680813/4e2d564e3.pdf
    • http://files.lauriebmorse.com/uploads/1/3/0/7/130775808/sapedodimugiregi.pdf
    • http://rikukeru.globalpassports.co.uk/uploads/1/3/1/0/131071252/9b1feb9c99d12.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/acanthospermum_hispidum.pdf
    • https://cdn.shopify.com/s/files/1/0437/9282/6517/files/allopurinol_davis_drug_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/pronunciation_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/kodukimafo.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/revub.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/bisaduwobefenasifom.pdf
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/rujufiwajanakiwutire.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7876/files/nimalax.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/14365623952.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/46519236196.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da3.bin
146265f6898bdb39f388ac59899e6cc5573ed16dafae47931de07f273fc087b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA3 5180 bytes
font_01_sfnt_off00007f25.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F25 3720 bytes
font_02_sfnt_off00008a88.bin
dcff58423a73c3aee1d15127628ee766db8c6cfdac8e491ad1a169d2d611fe2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A88 10532 bytes
font_03_sfnt_off0000ae93.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE93 16164 bytes
font_04_sfnt_off0000c3e4.bin
8d9a5bbdedfabd80c8aeaa651d318d082700000a938c293d1f9561cd885b53ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E4 8140 bytes

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