Malicious PDF — malware analysis report

Static analysis result for SHA-256 db714c07a7800911…

MALICIOUS

PDF

84.1 KB Authoring application: pstoedit First seen: 2020-09-24
MD5: cba739d5621e9db3c65da67ce67fed93 SHA-1: ac2bc59cee7e3c9114ff6961e5479876acecb9e9 SHA-256: db714c07a780091186b23703755e9534cc699bef2f3abd2c427721f057d6ad71
192 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://humanizingtheenterprise.com/uploads/1/3/0/5/130540211/2613823.pdf In PDF document text
    • http://moveablefeastlexington.org/uploads/1/3/0/2/130270823/48cc4660ad3670e.pdfIn PDF document text
    • http://johnnyappleseedofaphasiaawareness.com/uploads/1/3/0/3/130323469/konizalefizad.pdfIn PDF document text
    • http://webmail.nmctkd.com/uploads/1/3/0/2/130273915/ac7986b84.pdfIn PDF document text
    • http://www.cryptotalkllc.com/uploads/1/3/0/5/130539518/4cd61a1f19314.pdfIn PDF document text
    • http://218a4293p12rb.com/uploads/1/3/0/7/130775511/4f9e0.pdfIn PDF document text
    • http://nomadicwellness.com/uploads/1/3/0/7/130739615/7314919.pdfIn PDF document text
    • http://rainerhaycraft.com/uploads/1/3/0/4/130492038/gakuwumijefizo.pdfIn PDF document text
    • http://doitallpressionals.com/uploads/1/3/0/8/130814057/6917926.pdfIn PDF document text
    • http://nothinglikeadame.net/uploads/1/3/0/4/130483286/ccfdd6861.pdfIn PDF document text
    • http://myxlplyx.com/uploads/1/3/0/6/130620290/d012e8476327f23.pdfIn PDF document text
    • http://www.apteryxluxury.com/uploads/1/3/0/4/130489933/sodutigadepabod.pdfIn PDF document text
    • http://www.themobilestorage.com/uploads/1/3/0/9/130969920/zinovivamizugudanup.pdfIn PDF document text
    • http://rugbylabour.org/uploads/1/3/0/7/130739260/nuvog_wipatapiv_gelevoxi.pdfIn PDF document text
    • http://houserentalreviews.com/uploads/1/3/0/6/130605255/tegivorunige-nufipif.pdfIn PDF document text
    • http://westernwindowtinting.org/uploads/1/3/0/3/130324416/tunavopiliwa.pdfIn PDF document text
    • http://conjecturepartners.net/uploads/1/3/0/6/130604397/sovawapezogute_lipuzepo_zoxepu.pdfIn PDF document text
    • http://trackyourcalls.com/uploads/1/3/0/4/130494743/kogixefaluk.pdfIn PDF document text
    • http://minnesotahydrographics.com/uploads/1/3/0/7/130775109/130775109.html#teoria+da+argumenta%C3%A7%C3%A3o+jur%C3%ADdicaIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F95 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
font_01_sfnt_off000057d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57D1 11120 bytes
SHA-256: b5c1ccc7825dbd35cc4a736652aa821e692703c789b24f3a226be21e19b583f1

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