Malicious PDF — malware analysis report

Static analysis result for SHA-256 7850b8578773599f…

MALICIOUS

PDF

74.4 KB Created: 2021-02-23 07:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 83edbd75aa6fe20021115f395d5793f8 SHA-1: 5e5fe0afc740b1e1649d7c80c40aa0b5ad694f0b SHA-256: 7850b8578773599f5c356faf26effdc91f01876388a5f05f083c27d54367f0b5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, forming a link farm, and is flagged by ClamAV as Pdf.Phishing.Trojan. The primary URL, 'https://maypoin.ru/strik?utm_term=how+do+i+fix+my+irrigation+system', suggests a phishing or scam attempt disguised as helpful content. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=how+do+i+fix+my+irrigation+system PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366666/normal_5fc993bf29ea9.pdfIn PDF document text
    • https://pegujugadul.weebly.com/uploads/1/3/1/6/131637136/mimirudupofabixo.pdfIn PDF document text
    • http://skidki-day.store/53017265152qm75l.pdfIn PDF document text
    • http://xugejujivekivu.iblogger.org/dolajisiparuri.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fe4fa4ec2b5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469128/normal_5ffe4485b7fdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_602df001df4e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_6028421bb1b0c.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/3oG0hjO/22188817402.pdfIn PDF document text
    • http://wordsidepost.top/38224022355x69q3.pdfIn PDF document text
    • https://xovarexo.weebly.com/uploads/1/3/4/8/134895284/4740769.pdfIn PDF document text
    • https://nunosutelakib.weebly.com/uploads/1/3/1/3/131383720/zedadanuxolafi_xujuwavoxaxuwok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384296/normal_5ffb534dd0a88.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
    • 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_off0000d76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76C 5208 bytes
SHA-256: 8b31bfca851ef80f108add881fefc9eaa62ee79b492c0fe250a3ae2b0778ecfe
font_01_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 10960 bytes
SHA-256: f467512b4a722d88f1b6b4ba8fc1c3a2f46ba0afa9a966913a6b6f0f83fff372
font_02_sfnt_off00010e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E99 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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