Malicious PDF — malware analysis report

Static analysis result for SHA-256 31cbea4e425e632f…

MALICIOUS

PDF

36.0 KB Created: 2020-05-18 08:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-07-24
MD5: 5b7c5a001ffacf85891d191f1ff71273 SHA-1: 925a8055a705098d58583d4905cfc8b48e32d6ce SHA-256: 31cbea4e425e632f5df4cb8620cb884f6bd51f58ad10d93a7f8451eba60838cb
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to URLs that are also present in the list of extracted URLs. This suggests a coordinated effort to direct users to a wide array of potentially malicious or SEO-abusing content hosted on numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://deliciouscupcafe.com/uploads/1/3/0/3/130323479/130323479.html#delhi+air+quality+report PDF link annotation
    • http://orakel.xyz/uploads/1/3/0/5/130545827/a9dac31cfd77d8c.pdfIn PDF document text
    • http://antodesigns.com/uploads/1/3/1/6/131636965/wudor.pdfIn PDF document text
    • http://onenessoregon.com/uploads/1/3/1/4/131406739/6335858.pdfIn PDF document text
    • http://sonnydaily.com/uploads/1/3/0/6/130604175/096fb7d42b98d.pdfIn PDF document text
    • http://greenmtngeezers.org/uploads/1/3/1/3/131379608/194642.pdfIn PDF document text
    • http://seattleairportshuttlecompany.com/uploads/1/3/0/4/130483863/4141443.pdfIn PDF document text
    • http://johnniesautogear.com/uploads/1/3/1/3/131380755/wagikisowamapeg.pdfIn PDF document text
    • http://kamcoservicesllc.com/uploads/1/3/0/5/130539035/kevul_boxovedara_dokunafazipumas.pdfIn PDF document text
    • http://lesbeauxjours.net/uploads/1/3/1/6/131606434/piwefetodaz.pdfIn PDF document text
    • http://catchacheat.org/uploads/1/3/0/8/130813601/nejoregemaruzapir.pdfIn PDF document text
    • http://startupfestaustralia.com/uploads/1/3/1/1/131163751/3bdfde77.pdfIn PDF document text
    • http://healingvirtueministries.org/uploads/1/3/1/4/131455475/derukijagil-tidezorafujer-zajiwitawofu.pdfIn PDF document text
    • http://vevey-reveillon.ch/uploads/1/3/1/4/131454580/zogodog.pdfIn PDF document text
    • http://vgc-morje.si/uploads/1/3/0/5/130542718/lejixununen-linig-mijafasad.pdfIn PDF document text
    • http://on-pointprimarycare.com/uploads/1/3/0/7/130739475/kifaz.pdfIn PDF document text
    • http://francescdeverntallat.cat/uploads/1/3/0/9/130968926/rewazamavorag_japixowo_suvarojo_vuketiboru.pdfIn PDF document text
    • http://torrespaint.com/uploads/1/3/0/5/130550976/bc547c8b22392.pdfIn PDF document text
    • http://rdharmertruckin.com/uploads/1/3/1/3/131384306/mememonesizowa_gefupe_mudidotime.pdfIn PDF document text
    • http://lisiemo.nl/uploads/1/3/0/8/130813586/2aad569eff2cc5.pdfIn PDF document text
    • http://pronauticgabon.com/uploads/1/3/0/4/130435551/8191477.pdfIn PDF document text
    • http://mytourphone.com/uploads/1/3/0/7/130739247/869156.pdfIn PDF document text
    • http://isaacbarrios.com/uploads/1/3/0/6/130605178/kenefusuzaku_dekiboxadetuxu.pdfIn PDF document text
    • http://womeninbattleministry.com/uploads/1/3/1/4/131482892/risejelebiz.pdfIn PDF document text
    • http://all-car-parts.net/uploads/1/3/0/7/130775827/vidomul_pulimoro_tofevepixudog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 10400 bytes
SHA-256: 8942d6b6c13c4b3936084c3b959591efbdb1d880fd1fbdf3ade57a66126ae6f1

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