Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb951c1bed479ef…

MALICIOUS

PDF

592.2 KB Created: 2021-03-17 11:08:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c4167c6f97876779c5f26e2a18e03c92 SHA-1: 7e0023c03b7d49100159af0b0279012dd4438b24 SHA-256: 1bb951c1bed479efdef924e842b8a9d78843aa0ff55fae4ef816d561fe3d07c4
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7883

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/wix?keyword=flood+mitigation+strategies+in+points PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405443/normal_6045e46239fdc.pdfIn PDF document text
    • https://kogafisefog.weebly.com/uploads/1/3/1/4/131438876/ee896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_5fde617ce4e0f.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/815927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489724/normal_5fe8f2dbe794e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475577/normal_6019919e439c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388156/normal_60072496b02cc.pdfIn PDF document text
    • https://fegoparowewara.weebly.com/uploads/1/3/4/3/134321013/34368678a16c8.pdfIn PDF document text
    • https://xadigepuve.weebly.com/uploads/1/3/1/4/131454317/turodu_luvisagum.pdfIn PDF document text
    • https://kobokudebixisog.weebly.com/uploads/1/3/5/3/135390699/xevekezozerubegati.pdfIn PDF document text
    • https://vofamebibefa.weebly.com/uploads/1/3/4/6/134694090/d188e9b7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_603f17189d099.pdfIn PDF document text
    • https://zaxefuki.weebly.com/uploads/1/3/5/2/135299090/e60baea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478378/normal_602a27be8a320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410004/normal_5fe8ea0238180.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/6028510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375204/normal_6002a7db62489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_603e3cf403013.pdfIn PDF document text
    • https://wesoxuzepa.weebly.com/uploads/1/3/4/3/134372623/futakenutibip.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/kannada_full_movie_in_tamilrockers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_6031284908268.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beritoka.rf.gd/democracy_and_civic_education.pdfIn PDF document text
    • http://tavupikegoseri.epizy.com/normandy_map.pdfIn PDF document text
    • http://guwaduroredidaj.rf.gd/central_dogma_of_protein_synthesis.pdfIn PDF document text
    • http://zezogif.rf.gd/adobe_lightroom_cc_2020_system_requirements.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_off0008dd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD1F 5236 bytes
SHA-256: c3b78618c586ed14b48345d8deb27b6f0dee548a8f1f0ac589f4a362615ccd77
font_01_sfnt_off0008eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EED9 12796 bytes
SHA-256: 887f3b5e0a4656c4d701eb5bf5e4982dc9cad02699e3ae2ec519b07f1a1fed37
font_02_sfnt_off00091a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A78 16152 bytes
SHA-256: 8d085fb61775106f352b3c754f3ce3e5beb5ea8ed247c33b6c59a26f7370a4f6

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