Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4334ff1735c80f3…

MALICIOUS

PDF

78.3 KB Created: 2021-02-06 17:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1dacb0dec0eff3d588636e9c3394decb SHA-1: 55419b4e01cadaa860b3765fe149917f81a8ebdd SHA-256: a4334ff1735c80f3b6f5073dbea0e326c87e5c5e285539acdd3d3f87b9383630
192 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link farm and ML classification flagging it as malicious. The document body, though corrupted, suggests a lure related to 'Autozone return policy battery', consistent with phishing or scam attempts. The presence of numerous external links, including one to 'jottigo.ru', indicates a potential attempt to redirect the user to a malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=autozone+return+policy+battery PDF link annotation
    • http://prizinsta.info/fizuguzumolidum8qzi.pdfIn PDF document text
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/mavebusodig_manopugizadi.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/csr_racing_2_tuning_guide_toyota_86i80x5.pdfIn PDF document text
    • http://newberginvestmentproperty.com/963539523697l0zr.pdfIn PDF document text
    • https://cdn.sqhk.co/pasovevutuvi/FhaGheA/verizon_one_talk_app_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/hiCwihh/super_suite_inn_san_antonio.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/23a1cf350ef87a.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/2jewwii/kapavip.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/davolazupivowi/11657534565.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/46191548589.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/rurikawixepomibawopu.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/fozivoz.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/chalte_chalte_song_instrumental_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/bullworker_chart.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE107 5032 bytes
SHA-256: b3333b8bb1c152c81312c1ed647c7db108bcdfdddb71ebf8171f1dbce2dc12a8
font_01_sfnt_off0000f243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 10620 bytes
SHA-256: a416ac10ee575bd14313abdbdf191202e48684898472676225bdc19fb0f70195
font_02_sfnt_off000116ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AC 16336 bytes
SHA-256: b1f5ea7eb6df56fdc2a0c8d605c92c3a2ccbbe74327d2aac8c0510abb85ec908

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