Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dd4f98f7be20b8…

MALICIOUS

PDF

76.4 KB Created: 2021-04-10 13:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2f76ff7637f01982f2392f3117ed5b33 SHA-1: 4a2fad4614ec4f01ca5d9ff6f7bd47081d89a14e SHA-256: 63dd4f98f7be20b8c1da0324719ba5c4f7a505bfc9475f94a67ffe27b946d290
146 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The presence of numerous external URIs, many hosted on disposable domains and employing UTM parameters, strongly suggests a phishing or credential harvesting attempt. The 'SE_CALLBACK_LURE' heuristic further supports a social engineering pretext, likely aiming to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/strik?utm_term=gopro+hero+3+price+in+philippines PDF link annotation
    • http://lugodapamaj.mygamesonline.org/36683300994.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/6gjghij/keep_talking_and_nobody_explodes_xbox_one_key.pdfIn PDF document text
    • https://nolopatemima.weebly.com/uploads/1/3/4/5/134583633/jodesilas.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/hfBQJjc/lapuxaxode.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/gfhdCkW/23073760594.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/6nibCjg/digital_coupons_harbor_freight_tools.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_603b8975de879.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/lspdfr_best_mods.pdfIn PDF document text
    • https://gofuzuxelizexo.weebly.com/uploads/1/3/5/3/135391542/fivumane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485299/normal_6015419b50730.pdfIn PDF document text
    • https://wimowago.weebly.com/uploads/1/3/0/7/130775393/xisulekudorufat-xewokalur-rujotekerikarus.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/counter_terrorism_and_human_rights.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/vefoxuwosibowetiveze.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/sojebelevenex/brain_teaser_worksheets_for_middle_school_students.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/aurlus_mabele_embargo.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/butterfly_life_cycle_worksheet_free.pdfIn PDF document text
    • http://lebodevafetag.epizy.com/dvt_nice_guidelines_2017.pdfIn PDF document text
    • http://katetagozu.epizy.com/risiduvumi.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_off0000ed7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7F 5004 bytes
SHA-256: 974f6b3df6590653d45957bb32d639752813e7d21e8f585ca66ebf6ff78fb0cf
font_01_sfnt_off0000fe88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE88 11140 bytes
SHA-256: a16c77ddd094a99030c62b671882dc5086f3c3bd565a275c3341e026b9ffa5df

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