Malicious PDF — malware analysis report

Static analysis result for SHA-256 9208b09fb810a798…

MALICIOUS

PDF

97.4 KB Created: 2021-04-05 10:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fe4635a80056b38cd3f8f1a05010bdb9 SHA-1: 97d3c9a936966c957a4bbc98bade42fb15fa1047 SHA-256: 9208b09fb810a798e280a70dfe8ed09a7b3268e563dc426dd38140bd3ad27677
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://druttle.ru/wix?keyword=starting+strength+pdf+program PDF link annotation
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/3cd58.pdfIn PDF document text
    • https://jepusujejo.weebly.com/uploads/1/3/4/5/134598091/3802121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/what_are_some_words_ending_with_ly.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_e1ea126e085a445ba7ea041d53119c77.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abff3a8-5b11-4e7f-a40f-5d95a02a2e19/11597044185.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/dojejatujarokuvivepen.pdfIn PDF document text
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_453eb5d9cb964db9b99de07469e586b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/elgato_hd60_computer_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31271daa-7023-47f5-a3ae-b7ed6690af9c/likunage.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/little_house_on_the_prairie_episodes_season_10.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/1819040803.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/50412300758.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_13239d8858ec46678458b1805b032c34.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/bafumunegi.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/black_background_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/50435805274.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/coreldraw_2018_keygen.pdfIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_aa3791b7eefa42afacbe1285a472f07e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuboki/98876531134.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD2 5524 bytes
SHA-256: eb251ef221c0d6d54b0b91edb3f0f53b15188e184c08b5fe293867287520610b
font_01_sfnt_off00015278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15278 11180 bytes
SHA-256: e842c4fa0f3182aa51434df310906e84aa2383eca2601255458a341d7cca57ff

Open this report in the interactive analyzer, or submit your own file for analysis.