Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf98a5aec39070d5…

MALICIOUS

PDF

46.5 KB Created: 2020-03-30 21:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: fe2c40a774197423b3c279ae0d9298d4 SHA-1: 87074835086a6dcb49635f87f11ed81e917d8e3f SHA-256: bf98a5aec39070d53fa96d0788431442f4560ef96e51d72bc7b67f477cf6387c
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on unrelated domains. This suggests a link farm or SEO manipulation tactic. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be instructing the user to open a password-protected archive, a common method to bypass gateway security. The embedded URLs are likely used to distribute further malicious content or redirect users to phishing sites.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://julianthology.com/uploads/1/3/0/2/130289409/130289409.html#emory+dynamed+plus PDF link annotation
    • http://sandyridgebaptistchurch.org/uploads/1/3/1/3/131383753/b74171ea429f3bb.pdfIn PDF document text
    • http://polarityspin.org/uploads/1/3/0/8/130873893/muzodamiw_madebu.pdfIn PDF document text
    • http://personalblogmadt.com/uploads/1/3/0/6/130639170/felafogugibugepu.pdfIn PDF document text
    • http://dropinautocare.com/uploads/1/3/0/3/130313495/keresa-linegepul.pdfIn PDF document text
    • http://diolsen.com/uploads/1/3/1/0/131070255/fiseporeger-kasaseg.pdfIn PDF document text
    • http://bloodoncanvasmovie.com/uploads/1/3/0/6/130621021/1236625.pdfIn PDF document text
    • http://greenstarinsuranceagency.com/uploads/1/3/0/6/130620302/5966632.pdfIn PDF document text
    • http://barringtonmasons.com/uploads/1/3/1/0/131070705/2896905.pdfIn PDF document text
    • http://colvigconsulting.com/uploads/1/3/0/6/130620209/e1aacb2de.pdfIn PDF document text
    • http://torroshotbuckinsauce.com/uploads/1/3/0/7/130775217/c76a15074303.pdfIn PDF document text
    • http://m2artndesign.com/uploads/1/3/0/9/130968972/56bb8f.pdfIn PDF document text
    • http://kiplinganimalhospital.com/uploads/1/3/0/5/130588880/fipam.pdfIn PDF document text
    • http://sculptedforest.com/uploads/1/3/0/9/130969571/bifuwi.pdfIn PDF document text
    • http://sunglomobile.com/uploads/1/3/0/5/130589312/b4f358396.pdfIn PDF document text
    • http://worldpetpod.com/uploads/1/3/0/2/130270955/f4a80f.pdfIn PDF document text
    • http://1923meinersroad.com/uploads/1/3/0/6/130639085/sajejojexilemon_nopefifi_vikanakafes_jafitoner.pdfIn PDF document text
    • http://pottershousesantaclarita.com/uploads/1/3/0/5/130550778/tekuwowasot.pdfIn PDF document text
    • http://marielasolorzano19.com/uploads/1/3/0/7/130776594/3786802.pdfIn PDF document text
    • http://purebrokersfl.com/uploads/1/3/0/5/130590310/wajipatumomib.pdfIn PDF document text
    • http://staystrongphysiopilates.online/uploads/1/3/0/7/130775053/7136315.pdfIn PDF document text
    • http://badbarbiemedia.com/uploads/1/3/0/7/130775776/tidasetuxovonuf-tevasisovixok-tofutevanakipij.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00007765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7765 8160 bytes
SHA-256: 5bea31fffe48f0146316d50957de85be75b4e4e4aea713c428a536c89a409fc8
font_01_sfnt_off000096fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FE 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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