Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec09dfb94ed88b7…

MALICIOUS

PDF

42.6 KB Created: 2020-10-29 17:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ecd5229402a267714ddd9b5b70897f31 SHA-1: 455abd77846bee1ca766c387d46c112980712550 SHA-256: fec09dfb94ed88b7f5eeba8d2048121f5a1593a34168ba7fc3bf69134f5e8a64
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with the primary one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a "Pathfinder player's guide pdf". The presence of multiple links to external PDF files, some hosted on Weebly, suggests a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted, but the heuristic firings strongly indicate malicious redirection and link farming.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?keyword=pathfinder+player%2527s+guide+pdf In PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/venasufifiseka.pdfIn PDF document text
    • https://xukaxikerebata.weebly.com/uploads/1/3/4/0/134042698/datap.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/fe19c4.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/dimeso_xegamuta_lefafuwesigu_budos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6951/4143/files/gooseneck_trailer_hitch_locking_device.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7333/0593/files/51033719283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/84860732396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4338/7049/files/92709121734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e537f88b-7830-4ba5-923d-87ea9b9f3f29/dusamajabubaniwofos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb75817-7b0f-41c5-bd29-107ea5a6d005/arma_3_takistan_life.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A43 5212 bytes
SHA-256: 05cf5310c8d098cbdeb42753539a5a69f6c223d4aa54346770b1520c337dd413
font_01_sfnt_off00006bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF5 10348 bytes
SHA-256: a4f01bc63d8fac3cb3047a6532b4ee0a37a7915adb57760b4ffee37ca061482e
font_02_sfnt_off00008f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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