Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edb459f14ee47e1…

MALICIOUS

PDF

41.0 KB Created: 2020-03-13 04:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c63400cc4a443eb49a787f9c7388394b SHA-1: d5ff3af4cbb0a6b8233c3653b249c31ee1818fff SHA-256: 1edb459f14ee47e131e2cd6eb48295a1efe92a29292a4461fecb9ab6da741bac
94 Risk Score

Malware Insights

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

This PDF document contains a large number of external links to other PDF files hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a tactic to manipulate search engine results or to distribute further malicious content. No scripts were extracted from this sample, but the sheer volume of outbound links points to a malicious intent, likely related to SEO spam or a phishing lure.

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://vps4-boss.pleasingfood.com/uploads/1/3/0/5/130590030/130590030.html#data+science+from+scratch+2nd+pdf
    • http://deerwoodscoffee.com/uploads/1/3/0/8/130814761/tatonavokawikobadaf.pdf
    • http://www.simply-unique-online.com/uploads/1/3/0/4/130478935/e2034b2f1405b4.pdf
    • http://ashlandkitchenevents.com/uploads/1/3/0/5/130540585/jeroguveg-pezure-tupil.pdf
    • http://www.persianbeeders.com/uploads/1/3/0/6/130604304/lezajubopunije.pdf
    • http://mta-sts.mail.idahohorsecouncil.com/uploads/1/3/0/6/130605078/3838520.pdf
    • http://kevinlamar.com/uploads/1/3/0/6/130620693/bojukunadi_saxamove.pdf
    • http://helpgarret.life/uploads/1/3/0/6/130605278/vukepuw.pdf
    • http://roddee.net/uploads/1/3/0/7/130776223/870244.pdf
    • http://cognivity.com.au/uploads/1/3/0/7/130775197/nowezubelegube_soretoriletofiv_geketojemomimow_juvav.pdf
    • http://moorebuiltllc.net/uploads/1/3/0/6/130622068/lapamebelorinaxi.pdf
    • http://thehouseacrosstheway.com/uploads/1/3/0/4/130488370/kexigomoke-zixuwu.pdf
    • http://braedanritter.com/uploads/1/3/0/6/130639845/60dcefc06.pdf
    • http://plainenglishfordoctors.com/uploads/1/3/0/6/130604203/xigexemujukib_nebamoxeguwol_nopesiw_sijifinupi.pdf
    • http://shariforboiseschools.com/uploads/1/3/0/7/130739312/3378749.pdf
    • http://annamariesarmy.com/uploads/1/3/0/7/130776314/5043e78e3186.pdf
    • http://mbmix.com/uploads/1/3/0/6/130639178/2c213ba.pdf
    • http://www.panturoiub.com/uploads/1/3/0/5/130545627/matanapi.pdf
    • http://morgan-foundation.org/uploads/1/3/0/7/130775834/99725417ed6a470.pdf
    • http://hilleke.info/uploads/1/3/0/8/130813787/kokatuxike.pdf
    • http://mta-sts.charisvocals.com/uploads/1/3/1/1/131163857/valefupetunolur_xakiwulidimisut.pdf
    • http://giworthy.com/uploads/1/3/0/5/130543787/nevizujemozabiwoputa.pdf
    • http://www.roberthardi.com/uploads/1/3/0/6/130604045/af1751c47.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_off0000769b.bin
ea3e2f36e01a4b7fffded1bfbb5e15c7c187e999d4d842369193986331e1f7c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 8156 bytes

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