Malicious PDF — malware analysis report

Static analysis result for SHA-256 298708557c019a83…

MALICIOUS

PDF

75.0 KB Created: 2021-02-12 10:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 427ea56bd9c63a9dedb37f979887772e SHA-1: aced027718774d80642f68c3173ed29fe1b99fb2 SHA-256: 298708557c019a83c889d6dc180a8ea53228f711a07103671f23f01a8f316df6
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, forming a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to e-commerce planning, likely to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=ecommerce+website+planning+worksheet PDF link annotation
    • https://cdn.sqhk.co/rogenujudita/aoMjdja/basketball_hoop_base_plug.pdfIn PDF document text
    • https://kopodeju.weebly.com/uploads/1/3/1/4/131483627/6380586d52bcef.pdfIn PDF document text
    • https://kokozorakozuwel.weebly.com/uploads/1/3/0/7/130775651/wibigetazo-fabekesifina.pdfIn PDF document text
    • http://jushq.pro/14837871715ov24t.pdfIn PDF document text
    • https://jowanubeso.weebly.com/uploads/1/3/5/3/135399775/7395212.pdfIn PDF document text
    • https://kazikuxixaremu.weebly.com/uploads/1/3/0/7/130738513/0d73b1b17f04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459325/normal_600249f62cdfe.pdfIn PDF document text
    • http://replyua.site/twilight_forest_mc_1.12.2_3.8.689_doufs7i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5ffe8836cdd8a.pdfIn PDF document text
    • https://cdn.sqhk.co/vavewiren/ijgdae6/fishing_age_fishing_game_to_reward.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/2gjgiNT/insane_labz_slender_para_que_sirve.pdfIn PDF document text
    • https://cdn.sqhk.co/xoguvamev/gVgdPRy/47193008775.pdfIn PDF document text
    • https://lanilemu.weebly.com/uploads/1/3/1/3/131381326/pinusenemiw.pdfIn PDF document text
    • http://marketeuro.pro/red_linen_cotton_sheets7o1zo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490515/normal_6020b7d1b8f41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujixus/17146651960.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82A 5600 bytes
SHA-256: fd27e95a4e245d2b33b2132ffa7f2c407978d40e0368e5f5a2e233e52c3ae60b
font_01_sfnt_off0000fb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 10564 bytes
SHA-256: f67a11464ba07b5eaef176f6974016be26ef23b44f78a7e488b8cf3c6396d3ae

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