Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3470954fb67feb…

MALICIOUS

PDF

71.9 KB Created: 2021-01-12 01:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dfe021817fe852fd814df9835ff816e1 SHA-1: 76926cc6b60e6a5970b76c1fd987d4f55f4a4197 SHA-256: 2b3470954fb67feb8f323478eb270221952d31f8e12db8fd6fb57b3324a40dd3
262 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.001 Malicious Link

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document employs urgency and MFA lures to trick users into clicking embedded links, which likely lead to credential harvesting or further malware. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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
  • 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://traffking.ru/wb?keyword=volume%20booster%20plus%20app%20download In PDF document text
    • https://static.s123-cdn-static.com/uploads/4403140/normal_5fe44016c316b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369646/normal_5fc7477feb9a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5fd3520240d27.pdfIn PDF document text
    • https://site-1219602.mozfiles.com/files/1219602/commercial_electrical_load_calculator_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426557/normal_5fef54a0de71a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5fd098d2073c0.pdfIn PDF document text
    • https://site-1171720.mozfiles.com/files/1171720/astellas_stock_performance.pdfIn PDF document text
    • https://site-1177663.mozfiles.com/files/1177663/65112516149.pdfIn PDF document text
    • https://site-1173237.mozfiles.com/files/1173237/citytopia_vs_simcity.pdfIn PDF document text
    • https://pujuferot.weebly.com/uploads/1/3/4/6/134657525/nabokir.pdfIn PDF document text
    • https://zesijijonade.weebly.com/uploads/1/3/0/7/130776416/poxamazuwujidosatuli.pdfIn PDF document text
    • https://site-1171133.mozfiles.com/files/1171133/stay_alert_stay_safe.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/6Whagcw/dr_dave_martin_wikipedia.pdfIn PDF document text
    • https://site-1166708.mozfiles.com/files/1166708/54423121377.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/8825171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD20 5300 bytes
SHA-256: 181163422ea982cdbc5e56905ce7b3da7c8d345b90cc8025318259a6d46f9241
font_01_sfnt_off0000ef17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF17 10376 bytes
SHA-256: a4e37ef5fc78b5e4e4a181abe6b04bf5e57a2bebb7b84fdfd1cea8393f642442

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