Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbb041dab973a88…

MALICIOUS

PDF

49.0 KB Created: 2020-10-29 00:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: dfcb558a3a19a181245fc479a59b2b0c SHA-1: 27b0b8fffdda9eedbb758e32e812cd047c1e7cf9 SHA-256: abbb041dab973a88342f67aadfabc2972a1af1f3eb2429c07f4fe3ec87966a12
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF links, suggesting a link farm or phishing lure. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful sites.

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/aws?keyword=teleport+command+minecraft+switch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_5f8b56d45c8f3.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/wetoviwebotuzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5f913bacdad65.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/fazebokirep_dukoferuperura_kujiwubeber_tiguxarogeki.pdfIn PDF document text
    • https://gawubodukajine.weebly.com/uploads/1/3/0/9/130969599/medazabazukugaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5f969fd56dc77.pdfIn PDF document text
    • https://videxopefofima.weebly.com/uploads/1/3/4/1/134131768/5836106.pdfIn PDF document text
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/nozisixaboj.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/zakitakesopizev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_5f973bebb1b07.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/dawisuru_letinili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f8b38017c3b0.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/1/0499/5049/0814/files/20593980226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/fundamentals_of_physics_by_halliday_resnick_and_walker_10th_edition_vol_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/auricularia_cornea.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8546/6267/files/kugujukuvemuxixifugikomaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9038/6330/files/7279168371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1484/8671/files/nota_fizik_tingkatan_4_dan_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9302/3638/files/48851828958.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/46698639147.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_off00006cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 5224 bytes
SHA-256: 3e812f068c79981f8e8580d17fbbe658b7787059d188f1fcaf69b9e2298b757e
font_01_sfnt_off00007e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4C 13308 bytes
SHA-256: 94bdaebfc18231ea01fbf4178e52276a1d5e22fde687cf7394202bed0aad7eee
font_02_sfnt_off0000a8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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