Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e94ec8da76a1d0…

MALICIOUS

PDF

40.3 KB Created: 2020-03-29 07:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 393406f2e0b7fd0d6f53baf222ee1672 SHA-1: bb1798a94e78e197dde9ff66cbfd9a7040385a19 SHA-256: d5e94ec8da76a1d0e077171b7a3ec7e5e24108cf4084a1ca9dcf2c97f1898677
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The document body contains a mix of text and URLs, including 'Libros sobre liderazgo cristiano', which appears to be a lure to disguise the malicious intent of directing users to numerous external PDF files.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://foothillsbiblefellowship.com/uploads/1/3/0/3/130379293/130379293.html#libros+sobre+liderazgo+cristiano
    • http://www.normasellssunshine.com/uploads/1/3/0/7/130739024/jamosun.pdf
    • http://www.ofiteccbtis102.com/uploads/1/3/0/7/130776536/kojizoziveje_lojipe.pdf
    • http://www.theroyalpineapple.com/uploads/1/3/0/7/130738921/cb0fe49c5f15.pdf
    • http://www.eurekaproperties.org/uploads/1/3/0/8/130813400/6747128.pdf
    • http://www.junecosmetics.co/uploads/1/3/0/7/130775131/6160017d93.pdf
    • http://weluckyfew.com/uploads/1/3/0/4/130491932/c36f1eac5b2892.pdf
    • http://nietcivil.com/uploads/1/3/0/5/130545681/1e6e3a0a25b13a6.pdf
    • http://edithacosta.com/uploads/1/3/0/4/130476412/8e5e2.pdf
    • http://abingtonassociates.com/uploads/1/3/0/5/130539309/xirizixomubijowal.pdf
    • http://sevier.me/uploads/1/3/0/7/130740318/nadorebu-senuf.pdf
    • http://www.roswellinfluencers.org/uploads/1/3/0/4/130476048/julebavabiwadi.pdf
    • http://ellisongreyofficial.com/uploads/1/3/0/9/130969823/457156.pdf
    • http://petrusmaintenance.com/uploads/1/3/0/8/130874340/losusatusisoxak.pdf
    • http://www.thebearspotshop.com/uploads/1/3/0/6/130620491/8418586.pdf
    • http://afadventures.net/uploads/1/3/0/6/130604977/4ef5b70e6.pdf
    • http://www.bodhi-tree-massage.com/uploads/1/3/0/9/130968917/sufururabe-kukememo.pdf
    • http://allworkapparel.com/uploads/1/3/0/8/130813609/1083908.pdf
    • http://mementomoriny.com/uploads/1/3/0/8/130874395/tawefut_lelevoz_kitanefofiwujug_demegi.pdf
    • http://pawprintsparlour.com/uploads/1/3/0/4/130483050/7246377.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000708b.bin
44c3fabdf4f976bb6192e2740462a43be6fdcbf9d02f978f6b9dbcc8834833e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708B 9348 bytes

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