Malicious PDF — malware analysis report

Static analysis result for SHA-256 f577bb8c0aa53665…

MALICIOUS

PDF

40.1 KB Created: 2020-11-09 16:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5e6210429901ac434bb2e1f4b5197fed SHA-1: e8624244651f2cb0eeb4cfe57f0aac7f6882a1fe SHA-256: f577bb8c0aa536656e41cb84ab72bfe081bd6e3263ed939b630709c2f210e44d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. One of these links, 'https://trafftec.ru/123?keyword=fossil+q+wander+manual', is directly embedded in the document body. The ML classifier also flagged this PDF as malicious. The presence of numerous external links suggests an attempt to manipulate search engine rankings or redirect users to potentially harmful websites.

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://trafftec.ru/123?keyword=fossil+q+wander+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384650/normal_5f988fa547774.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/6916491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5f8b94c0dcb3a.pdfIn PDF document text
    • https://katolafafesol.weebly.com/uploads/1/3/4/4/134479470/2786302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5fa938cc43709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5f921207b100e.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://uploads.strikinglycdn.com/files/23b6405a-0497-4b93-af38-e2258537c6f0/history_strongest_disciple-kenichi_sub.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/kigogogofejudodapapuseno.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/sword_art_online_hollow_fragment_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/zasevalixujogenonegezukud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac47440-06d3-444a-bc95-066f823a4c2d/gusume.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_off00004fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC8 4948 bytes
SHA-256: d2660413ef61ff0524e282d28e1b57aead7171f32e28389512c33df7ab18653b
font_01_sfnt_off0000607e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607E 10896 bytes
SHA-256: aec46c52b8ea226834544e21066d4b4dcfcdd629c3d3073ba8165e2b776a56a4
font_02_sfnt_off0000859e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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