Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46766f506c66990…

MALICIOUS

PDF

77.7 KB Created: 2021-03-26 09:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 47259bd3e4bc58d147775691f920a832 SHA-1: 9a4a02f885b4b8657cf744416b1cda1f5e48b7fa SHA-256: a46766f506c66990d4a3b523172ac8d755fd71dfd269bd6101f5ae8c729a7920
186 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 0.9997

Heuristics 6

  • 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.
  • 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://dafemum.ru/wix?keyword=buu+all+forms+power+levels PDF link annotation
    • https://cdn.sqhk.co/zisuxemop/jfpBKw1/lexia_core5_reading_levels.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485591/normal_6000a4254ca6e.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/how_to_write_a_good_poem_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/fqSZhfK/lenapawotinomobuka.pdfIn PDF document text
    • https://cdn.sqhk.co/rugugojeba/gmgioF2/zivirodoti.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/fheSrqI/56945569876.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/50564603255.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/Orwifhe/mozexuvasejeditagotude.pdfIn PDF document text
    • https://cdn.sqhk.co/dufubimaru/bhj59ii/dusenumenizudowizir.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/iewjhib/cosmopolitan_drink_nutrition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_6021c76c32b29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_aa9e260f09a847a0a7795142bcfb1806.pdf?index=trueIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_de943a84142e4ea0970057fb76f23c1d.pdf?index=trueIn PDF document text
    • https://65d0a56f-4074-4e8f-9acc-29e6f8e8f663.filesusr.com/ugd/37655d_e0fd547e44f14da7a03b5bea0d287e73.pdf?index=trueIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_bcd0906580364af59ccc2c41efb8b0cf.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_2102b279bc5d4e6ba30c50d716994b27.pdf?index=trueIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_e8e7a570d121481eb0e451bba5f737cf.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_486770becacb4cefb7bfd09508eb092c.pdf?index=trueIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_14b7031605ea4a3d9a9283a8d66dfcdb.pdf?index=trueIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_b1329023d8ea474482d3b16c2f728484.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_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 5248 bytes
SHA-256: 05149f27205a9f2095cfa2131f1ffd03258fa738564c583f6dce7888336732b8
font_01_sfnt_off0001029e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029E 11560 bytes
SHA-256: 24e3ef862970d3a7bb81e61496078e0ed35c4e219924f63dddb32ffb3c1c477d

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