Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e510636309ed32d…

MALICIOUS

PDF

41.4 KB Created: 2020-11-08 01:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2445b0169e9dc4446e26d01a37e41df4 SHA-1: e1f805301b18eaaf2e1be8464e3e9885bbcc3b31 SHA-256: 2e510636309ed32d90c9a60e3e61a02b3c2bc9d3ee3cfd2e30fb0f95a5ca8477
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of embedded external links, characteristic of a link farm or SEO spam campaign, with one URL pointing to a suspicious domain. The ML classifier strongly indicated maliciousness, and the document body, though partially obfuscated, contains keywords related to vehicle maintenance and a suspicious URL. No scripts were extracted, but the PDF structure and numerous external links suggest an attempt to drive traffic or distribute further malicious content.

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://trafffi.ru/123?keyword=transmission+fluid+capacity+2004+f150 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414175/normal_5f9d0ba7c4458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426813/normal_5fa711f20ef79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc079076-0e87-43ce-bdd3-942cd4976105/3034730212.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/anlage_n_aus_2017_formular.pdfIn PDF document text
    • https://fareseba.files.wordpress.com/2020/11/44840069822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f7b1c58-261e-4bcc-b220-3adb847f8daf/jawizozejirakumojojo.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/5_nights_at_freddys_2_apk.pdfIn PDF document text
    • https://rakodige.files.wordpress.com/2020/11/armature_reaction_of_alternator.pdfIn PDF document text
    • https://xoxedoxiki.files.wordpress.com/2020/11/wumudojoxilejutovasum.pdfIn PDF document text
    • https://bejagidet.files.wordpress.com/2020/11/jizokipometazud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be6a24ad-55ae-4aca-ba0b-0d4f2aa89b1c/tenney_grammar_school_twitter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48a4e33f-6aa5-4c56-9ed5-40fdd4f651c1/wahl_peanut_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e122aad-25ba-4cea-b06d-ad02615d474c/gilobi.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_off0000629a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 5888 bytes
SHA-256: 64a38d92b7ed29cb452dcad76359d2021d3c293506513010451fbb3d8202d6be
font_01_sfnt_off000076a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A7 9916 bytes
SHA-256: b84e9a80bf05440cb5f6646d530390123a33246964ce5e492ef0b36bcacbbfb4

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