Malicious PDF — malware analysis report

Static analysis result for SHA-256 77440cfacc90ef0b…

MALICIOUS

PDF

93.0 KB Created: 2021-01-15 05:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7c72c19025fe0b3ceb82497c12b06c66 SHA-1: 38c4e8fcca03891e0ade7140e6e1981175e0b1d6 SHA-256: 77440cfacc90ef0b808c1c253d328c0b59d017d36d014cf445201269d8d5d645
264 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, many pointing to disposable hosting, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Ugandan passport application forms', likely a pretext for phishing or malware delivery. The presence of numerous external links suggests an attempt to drive traffic to potentially malicious sites or host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/aws?utm_term=ugandan+passport+application+forms In PDF document text
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/zuvaredofoxub_fekoporuz_zizewud.pdfIn PDF document text
    • https://site-1171112.mozfiles.com/files/1171112/voice_lessons_iphone_app.pdfIn PDF document text
    • https://site-1172683.mozfiles.com/files/1172683/bubble_shooter_games_free_download_for_android_mobile.pdfIn PDF document text
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/gikuwenez-sajigigoxag.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/2657230.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/figifSN/braid_extensions_salon_near_me.pdfIn PDF document text
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/vitoleminanaxi.pdfIn PDF document text
    • https://gekuraneg.weebly.com/uploads/1/3/1/6/131637503/2251912.pdfIn PDF document text
    • https://cdn.sqhk.co/keliziniw/fmji2Sv/dr_king_capitalism_quote.pdfIn PDF document text
    • https://tejelodaburibav.weebly.com/uploads/1/3/4/3/134317360/5057150.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/garuwixanov.pdfIn PDF document text
    • https://ribelogexarov.weebly.com/uploads/1/3/4/5/134500322/kodiwuwavixis.pdfIn PDF document text
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/5407547.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CA 5136 bytes
SHA-256: fa09c35a7827dc52d84f6eef0f4ab59f73f7aef7d69cb7bd8d7667b5e8217d23
font_01_sfnt_off00011b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B21 11796 bytes
SHA-256: 6cb02cd541fa6f7b9ca50667a537afe95328cbbf9a1fcb7c826d421b1cca9590
font_02_sfnt_off00014380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14380 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61
font_03_sfnt_off0001587c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1587C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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