Malicious PDF — malware analysis report

Static analysis result for SHA-256 845e1237707480c2…

MALICIOUS

PDF

45.4 KB Created: 2020-08-11 19:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f560d37032745ae84a0ce59034199dd5 SHA-1: 5709ea47de49327cb5312f12fc6ae491077046a8 SHA-256: 845e1237707480c2708d835353b611edad84195454c66493a4bf71a90c5c08ba
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as a legitimate download for 'Bio data format in marathi pdf download'. This link redirects to malicious infrastructure, indicating a phishing or scam attempt. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=bio+data+format+in+marathi+pdf+download
    • http://files.veroandcostudio.com/uploads/1/3/1/4/131483266/godam_vanasojutekexur_xukof_mewis.pdf
    • http://files.theelmssarc.org/uploads/1/3/0/7/130775182/a2b15c305eaa84b.pdf
    • http://files.mrallansciencegfc.com/uploads/1/3/1/1/131164440/mekituwiduw.pdf
    • http://files.allysongiles.com/uploads/1/3/1/8/131858661/vopopikuduzaxonujavi.pdf
    • http://basuvixem.longevitymonth.org/uploads/1/3/2/6/132682076/2487191.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/33129037695.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/finekovovup.pdf
    • https://cdn.shopify.com/s/files/1/0440/7607/3125/files/nusepagopiroju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sagomowaroperovi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/82836157499.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdf
    • https://cdn.shopify.com/s/files/1/0439/4336/2715/files/sidakata.pdf
    • https://cdn.shopify.com/s/files/1/0433/9957/7756/files/20871533782.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4747/files/46953446804.pdf
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/bending_moment_and_shear_force_in_statically_determinate_beams.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/fajibulurifibogog.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6549/files/rudolisodozilagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7258/4870/files/76240953225.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/38095151989.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000643e.bin
151dbca5913cd261e009414e15f5010918072e226a14ddaee42082de2ca2ca65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643E 5244 bytes
font_01_sfnt_off000075f4.bin
aee61473069289ad4dbb73487bfaa9649ccb4f8ec54182292bf854cf82be3b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F4 9856 bytes
font_02_sfnt_off000097f4.bin
21f7d310346404e14d02d548af599721a34f8bfa3f228c3ad1e647b4efcd1cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97F4 4284 bytes

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