Malicious PDF — malware analysis report

Static analysis result for SHA-256 02851bf898cc8db0…

MALICIOUS

PDF

58.9 KB Created: 2020-08-11 01:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0591b5467c3ae796b51c841c938b58b0 SHA-1: d99ecc4bf5d0f038d5c9a11d43c5b94c7f72265a SHA-256: 02851bf898cc8db0687bb94e454c68d99abf742512daa144879e8b41614d6307
174 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a primary redirector URL, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate the document is designed to lead users to potentially harmful sites. The presence of a callback lure heuristic also suggests a potential for social engineering tactics.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/pify?keyword=thane+home+guard+bharti+2020+pdf
    • http://files.patriciabondrn.com/uploads/1/3/0/7/130739285/947726.pdf
    • http://files.fbcstgeorge.com/uploads/1/3/2/7/132740377/sofojitid-sokiwenawisase-nowefimebaj.pdf
    • http://files.speedwayandroadracehistory.com/uploads/1/3/1/0/131070309/9782484.pdf
    • http://files.apriljonesms.com/uploads/1/3/1/4/131406960/6340518.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0438/4758/1856/files/alcalosis_metabolica_pdf_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/19328743291.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/kavefumetibikufidakurego.pdf
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/gibapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2437/5194/files/nibimuwikixojinovo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4565/6488/files/behavior_modification_for_adhd.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/farisupinibukavub.pdf
    • https://cdn.shopify.com/s/files/1/0435/5637/2641/files/23630557372.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/38823869630.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/isometric_drawing_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/7763/9071/files/flywheel_energy_storage_system.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_off0000696f.bin
25a907a166d2f88d8b7f326152b809b69993aa3f62c24abba6850d01d9d80ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696F 5608 bytes
font_01_sfnt_off00007c4a.bin
d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4A 3720 bytes
font_02_sfnt_off000087ad.bin
73d3db09a34f53dbf10d899d1550d000a95dfb50737f8fb14225bdd6cc40a0d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87AD 10380 bytes
font_03_sfnt_off0000ab31.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB31 16092 bytes
font_04_sfnt_off0000c035.bin
81f4f006eb37725264553f9525256a3b95163ed28d968df4d9d5b46214b3a17a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC035 8876 bytes

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