Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c7c5b1ae3a3109…

MALICIOUS

PDF

86.7 KB Created: 2021-03-01 19:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 10feb2e1ea3b4018be4265e5f13c4273 SHA-1: c7559365d64190bf05828535aba4ad234dffecde SHA-256: a3c7c5b1ae3a3109c6790d21c94858c896df8c2973ee4bffe8e485941396b545
196 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains numerous embedded links to external websites, many of which are part of a link farm or lead to suspicious domains, suggesting an attempt to redirect users to malicious content or phishing sites. The document body, though partially corrupted, contains keywords related to 'gta 5 online ps4 money glitch', indicating a lure to attract users interested in such topics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://kuzutuzo.ru/wb?keyword=gta%205%20online%20ps4%20money%20glitch PDF link annotation
    • http://future-techno.ru/musafixazu9kc39.pdfIn PDF document text
    • http://wifefavowe.iblogger.org/flyers_templates_online_free.pdfIn PDF document text
    • http://setlyb.online/filter_for_snapchat_games_for_snap_filterscav4h.pdfIn PDF document text
    • https://bupafenanibud.weebly.com/uploads/1/3/4/0/134042845/bifodatebipozob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380854/normal_60089e951df62.pdfIn PDF document text
    • http://com-login8.xyz/the_importance_of_being_earnest_2002_online_freerrcjf.pdfIn PDF document text
    • http://coolvdomaion.online/world_of_greyhawk_wikiwuxca.pdfIn PDF document text
    • http://delayikapy.xyz/gefosexaworamyxtz5.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://robexekipojop.rf.gd/daily_behavior_chart_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/happy_anniversary_images_for_husband_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/sejux.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/vusuxezafipetom.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/zuzabezenas.pdfIn PDF document text
    • http://nufewaruxemo.epizy.com/comparatives_and_superlatives_adjectives_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/rcog_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/technical_documentation_html_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/bajobepovog.pdfIn PDF document text
    • http://dolifusekaxug.epizy.com/siwakusudise.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_off0001096d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096D 5384 bytes
SHA-256: cdfe2ae8475e91f76cf94befaa52066b75a1d993e6e6efe79c7eb0f3320057a3
font_01_sfnt_off00011ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA8 10596 bytes
SHA-256: 799fcf2b34f2e63ad76d0a76dc3703b090e22554e0e937778dc0d6325fc527ff
font_02_sfnt_off00013fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA1 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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