Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7092fe4d3f06fa…

MALICIOUS

PDF

75.2 KB Created: 2021-03-15 20:45:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 52142925983cd0e77acce32dd20ab867 SHA-1: e58077e7fd9a68fbef00ec46e559c7533c7b6a15 SHA-256: 7f7092fe4d3f06fa39bf132d4e6faaf55b60e110642eb17862c5f4fc09d50bfe
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or redirecting users to malicious sites. One prominent URL, 'https://midufefew.ru/aws?utm_term=where+is+the+serial+number+on+a+tecumseh+engine', suggests a lure related to technical information. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://midufefew.ru/aws?utm_term=where+is+the+serial+number+on+a+tecumseh+engine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389085/normal_6018885c08c5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486367/normal_603b16d4241a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461483/normal_5fc68e191573e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493600/normal_5fda89ad4f6f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454678/normal_601e04526beb9.pdfIn PDF document text
    • https://cdn.sqhk.co/jowowibow/fgjZJqX/weecare_emergency_alert_and_personal_safety_alarm_keychain.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/hVljdaQ/kijamalerunuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392470/normal_60432a32ea772.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/JagjYgg/wivegupiwidogobijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476427/normal_60479372b8752.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406516/normal_5fe24d2a79a80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458628/normal_5fc8293333901.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476288/normal_5fe5d9a224eb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_6025c62a4ef6a.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/kjbjjhg/iphone_software_update_in_spanish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486743/normal_6033ee833bd74.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/24a75a54-6105-42dd-9309-ca931c2e1418/68834540395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a4efbe-4da5-4fc7-96fc-22ed87b6c58a/15841491726.pdfIn PDF document text
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_f225217292ab43c094d687a5e426be28.pdf?index=trueIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_cdc928aa7eb04f9bbdae7c20d05e7d0f.pdf?index=trueIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_902b1b6f48c944389bf5a9e72f41f02d.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_off0000e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 5364 bytes
SHA-256: 73f829d6ad0afb71e15f7391469d80868e8fbf9f03a277938c2d3215c8613476
font_01_sfnt_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 10728 bytes
SHA-256: 3b8d5aa157a31e902c38ac0b23702c06829143df56ead75e889f001187b7d9b5

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