Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6b58948704d9c5…

MALICIOUS

PDF

40.4 KB Created: 2020-03-15 03:01:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: c82449fd3650dcab0250e6e4bd76a9ba SHA-1: 97b77e55cc50a12d83d6c244385139a7080e5d95 SHA-256: cd6b58948704d9c567b0392edd8c892b0a3ce5747d5925486517a3e65e216d63
104 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, many of which are SEO-optimized and point to other PDF files, indicating a link farm. One of the embedded URLs, 'http://berkessa.com/uploads/1/3/0/6/130639916/130639916.html#antares+autotune+5+free++full+version', suggests a lure for downloading pirated software. The presence of a visual download button further supports this social engineering tactic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://berkessa.com/uploads/1/3/0/6/130639916/130639916.html#antares+autotune+5+free++full+version PDF link annotation
    • http://c3industriesllc.com/uploads/1/3/0/4/130435694/ronov-lekesovoravalif-xuzufodidef-zatat.pdfIn PDF document text
    • http://bodycentralassignee.com/uploads/1/3/0/2/130289504/5392696.pdfIn PDF document text
    • http://allured.es/uploads/1/3/0/6/130604340/jadujorogafi.pdfIn PDF document text
    • http://casadeshenandoah.com/uploads/1/3/0/6/130605292/3bf63ad002fe.pdfIn PDF document text
    • http://richmondnonsense.com/uploads/1/3/0/2/130273748/lokuzopakigewazi.pdfIn PDF document text
    • http://www.zzportal.studio/uploads/1/3/0/7/130739910/4584309.pdfIn PDF document text
    • http://www.cocomindbodywork.com/uploads/1/3/0/3/130323266/jerupekipasojozaguj.pdfIn PDF document text
    • http://techniqueartist.com/uploads/1/3/0/5/130543106/didugene-kusazu-kovekipibibaf.pdfIn PDF document text
    • http://balmingileadskincare.com/uploads/1/3/0/7/130739265/2202f0c75b262b.pdfIn PDF document text
    • http://nimbus-realty.com/uploads/1/3/0/6/130604618/mivolomefetok.pdfIn PDF document text
    • http://bestchoicetaxandfinance.com/uploads/1/3/0/5/130552097/cd70b45c826c482.pdfIn PDF document text
    • http://christianbebrave.org/uploads/1/3/0/4/130490115/c5f7336bde73.pdfIn PDF document text
    • http://lkngoldens.com/uploads/1/3/0/8/130874197/zesusopipotijerumu.pdfIn PDF document text
    • http://lafayetteschoolrestoration.com/uploads/1/3/0/6/130621371/6918120.pdfIn PDF document text
    • http://americanbuiltcabinets.com/uploads/1/3/0/8/130813614/xizekoxijukulevisid.pdfIn PDF document text
    • http://www.jbkapp.com/uploads/1/3/0/2/130289519/nufomi.pdfIn PDF document text
    • http://www.omrr.org/uploads/1/3/0/7/130776841/116266.pdfIn PDF document text
    • http://mindfullmug.com/uploads/1/3/0/7/130775722/261231.pdfIn PDF document text
    • http://www.aimmanagement.co.uk/uploads/1/3/0/2/130270776/7130807.pdfIn PDF document text
    • http://www.bylisbon.com/uploads/1/3/0/6/130621859/1a2c1407ae6e.pdfIn PDF document text
    • http://internationalaid.net/uploads/1/3/0/7/130740027/dabevifesonik.pdfIn PDF document text
    • http://seattlecitylight.org/uploads/1/3/0/5/130588651/xevuzavutitemo.pdfIn 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

Related samples 2

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_off000075da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DA 7732 bytes
SHA-256: 3427706df5c78b99ba0d0e3b179a37af2de0f4a4f739aa6fb3b5f7bc8c561516

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