Malicious PDF — malware analysis report

Static analysis result for SHA-256 907469c0f22e03ba…

MALICIOUS

PDF

75.7 KB Created: 2020-12-28 19:28:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 18895a198061349fa58f5ed6e140beb2 SHA-1: edb178482bd657a4bbcc12e2d269ce8a63bb5edf SHA-256: 907469c0f22e03ba38233ed4e32849921434f9eddf5a5f373e76e97222fc5b6b
156 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 external links, many pointing to PDF files hosted on file-sharing services, indicative of a link farm or SEO spam campaign. The primary URL, 'trafffi.ru', suggests a malicious redirection or phishing attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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?utm_term=valuation+mckinsey+portugu%25C3%25AAs+pdf PDF link annotation
    • https://fepaxumezo.weebly.com/uploads/1/3/4/3/134320712/9e1cf377653c5.pdfIn PDF document text
    • https://pativezakuzorad.weebly.com/uploads/1/3/4/2/134266084/c5a90b4.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/7796764.pdfIn PDF document text
    • https://xonovezalewame.weebly.com/uploads/1/3/4/4/134489084/9153979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f90fa88d469f.pdfIn PDF document text
    • https://muzokive.weebly.com/uploads/1/3/4/4/134498707/81c6956af9fa1.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/b6e2b778-97af-4437-babd-5087a460cddb/veruwaduxojabizuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5961db15-af30-4656-b987-098fe72b39d2/regodonix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0f5a0a0-1701-4094-a2ff-a9e0a6f3e53e/onvif_device_test_tool_v17_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c8e4627-3cc8-4041-9f04-83d97aa65d09/sitazizedumirejoduvuwos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34520197-e6e6-4e6d-adaf-0681fa237e35/rick_and_morty_april_fools_episode.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_off0000d9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E8 5640 bytes
SHA-256: 5c42169986926ab730f2e8bb5437d52cb7000950b9df82c08f22cb634e890686
font_01_sfnt_off0000ecca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCA 10908 bytes
SHA-256: dac560ea0b049e1eebf0181163d1db1eef2ddc3e6d824879ee5866ba195923da
font_02_sfnt_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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