Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60af6ec143a53c4…

MALICIOUS

PDF

79.8 KB Created: 2021-04-20 00:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2521d493f697b5d2034c2ab447b41a41 SHA-1: e15a5c88f9ffa2d96c2c5107c4f5e0f1355bb59c SHA-256: e60af6ec143a53c4655ccf671d90a811247852623ca621129b03be34f17e2b05
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://vilenefex.ru/strik?utm_term=first+alert+carbon+monoxide+alarm+beeping+3+times PDF link annotation
    • http://loneresel.mygamesonline.org/hughes_hallett_calculus_5th_edition_solutions.pdfIn PDF document text
    • http://warajuvevuv.medianewsonline.com/alternative_tourism.pdfIn PDF document text
    • https://jorevubo.weebly.com/uploads/1/3/4/8/134869484/pupowu.pdfIn PDF document text
    • https://fagadiroduk.weebly.com/uploads/1/3/0/9/130969360/51e9e3.pdfIn PDF document text
    • https://zegazofegu.weebly.com/uploads/1/3/5/2/135296009/9996372.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/cancionero_cristiano_gratis.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/wejawaruf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexabimumemig.atwebpages.com/wobesulotezurarulu.pdfIn PDF document text
    • http://sumorililuduj.epizy.com/53297476853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49ee057-e50f-4e61-ac00-0931f21dc880/30620758448.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/honda_eg_1000_generator_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ea5e6d-93eb-4cd6-8635-a23bb0ecbe85/70955685598.pdfIn PDF document text
    • http://vidilig.onlinewebshop.net/gexuta.pdfIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_56e9a7ccb85646c88766b92e2b48644a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nojemi/americas_book_of_secrets_presidential_cover_ups.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e9f44a6-7c02-4d40-ab07-a725e86819bb/bible_verses_in_order_new_testament.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_f669ea378e4747368802585ef9d65e24.pdf?index=trueIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_98f297f8dd6e48dca20c5751039237d8.pdf?index=trueIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_b0d3ed5de05d413d86b99cc01e500930.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 5720 bytes
SHA-256: e8c3e49922c3475e745b4d18cc8621878aa6f6c005a080a6c6e5dfe020931a3f
font_01_sfnt_off00010929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10929 11272 bytes
SHA-256: c85cd3c971ad4eabbbea960aac073522a4fc20de8a3ab8b35e6b87ce5c010557