Malicious PDF — malware analysis report

Static analysis result for SHA-256 420685a5cea2c819…

MALICIOUS

PDF

60.8 KB Authoring application: PDFBox First seen: 2020-09-07
MD5: 0ab2c816c9efc64673658a011389b028 SHA-1: 1c5d26c99d3871dce2d24ad88b295ca68b675e44 SHA-256: 420685a5cea2c8190ae5e3458778811090270078e3facb2133c6aec5f7b6d962
192 Risk Score

Malware Insights

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

The PDF was identified as malicious by ClamAV and an ML classifier, and it contains a large number of embedded URLs. These URLs form a link farm, likely intended to direct users to malicious content or to manipulate search engine rankings. The document body contains garbled text, suggesting it's not meant for direct user consumption but rather as a container for the malicious links.

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://withfriendsinmind.com/uploads/1/3/0/6/130621411/gujazamepex.pdf In PDF document text
    • http://multifamilyfiber.com/uploads/1/3/0/7/130738970/4998087.pdfIn PDF document text
    • http://homeaudiocouture.com/uploads/1/3/0/6/130639853/2902009.pdfIn PDF document text
    • http://miriannysrivasfnpcmedicalaesthetics.com/uploads/1/3/0/7/130739286/tilofuxunobibiwis.pdfIn PDF document text
    • http://motorbikerecovery.org/uploads/1/3/0/5/130588191/wanelemuremaf.pdfIn PDF document text
    • http://trinityjamestown.net/uploads/1/3/0/2/130289232/376653.pdfIn PDF document text
    • http://kidsaap.com/uploads/1/3/0/2/130274355/xalagaranat.pdfIn PDF document text
    • http://rightweb.net/uploads/1/3/0/5/130588380/fofovit.pdfIn PDF document text
    • http://bellabee.org/uploads/1/3/0/5/130588712/rudimoleb-lolapagamuri.pdfIn PDF document text
    • http://webdisk.alifeforalifecommunity.org/uploads/1/3/0/7/130739049/kadujuzuza.pdfIn PDF document text
    • http://www.melindacocharaneauthor.com/uploads/1/3/0/8/130813985/3603363.pdfIn PDF document text
    • http://startupwala.info/uploads/1/3/0/7/130776196/rosifiwuxo_wukazaruwuxo_jufukevo.pdfIn PDF document text
    • http://betterbartlettschools.org/uploads/1/3/0/7/130739678/matukilabogalopepuma.pdfIn PDF document text
    • http://gz9c2.slpny.com/uploads/1/3/0/5/130589305/130589305.html#no%C3%A7%C3%B5es+gerais+sobre+administra%C3%A7%C3%A3o+p%C3%BAblica+em+angola+pdfIn 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_off0000146b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146B 11148 bytes
SHA-256: 9e0e04f333972aec2266c888a64885a9cd63b082b49258c040154e372981ecfe

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