Malicious PDF — malware analysis report

Static analysis result for SHA-256 372d40933c905478…

MALICIOUS

PDF

39.6 KB Created: 2020-11-09 11:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0f6117b016288810cc3244554b3ea300 SHA-1: 91d149a9731341886d24aba91186d9161ab6259d SHA-256: 372d40933c9054783e5e567765e12e87ffa8c3c62e49428448cb859f12813bdc
96 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 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 1.0000

Heuristics 4

  • 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://traffset.ru/123?keyword=maytag+dryer+bravos+300+series+owner+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462976/normal_5fa4b7c715408.pdfIn PDF document text
    • https://lalonofinesuver.weebly.com/uploads/1/3/4/4/134442061/kuvuvug_dimemejaluleva_zegozupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428334/normal_5fa1ad2fc4943.pdfIn PDF document text
    • https://sezariserafuf.weebly.com/uploads/1/3/4/6/134673330/zejikebiwi.pdfIn PDF document text
    • https://begumilipanup.weebly.com/uploads/1/3/4/6/134617951/giluzosudaji_jukilasez.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/vobuturinivi/tableau_tutorial_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef64772-75fe-4d03-b974-20fd34835acf/46835990194.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/11646786116.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/fudakizawaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a17360d-4853-44f2-b03a-c9cf93ba71b6/96744653337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/526e36c1-4ba6-4537-adcb-9825f67387ca/96074803036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ade23945-6036-48e8-9574-b9ddb4e722b9/fivawigozopadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18fbe85b-f7e8-4e93-8425-54e814047a5f/xodemivigor.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_off00005ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE0 5848 bytes
SHA-256: 24ed6cb3fce9b5a1d341fbecc2b62dd11da07e92223b208aba7e18cecb654933
font_01_sfnt_off00006eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDA 10216 bytes
SHA-256: b8b7c5c23b38c500b3bcc8129a4ad76b52b5f2d29d1f9ddc596be9fdffdf4841

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