Malicious PDF — malware analysis report

Static analysis result for SHA-256 69199371a74df34b…

MALICIOUS

PDF

87.8 KB Created: 2021-03-20 18:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e22a8e913f0ae8d88d2231a0f766f32 SHA-1: 1df6494def9b188babba609d08d30d2e030b4708 SHA-256: 69199371a74df34b3c50c46327a25ffe1ca0b040cd07b0fa567faf2715e5e888
156 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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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 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.
  • 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/strik?utm_term=finding+missing+sides+of+congruent+triangles+worksheet+pdf PDF link annotation
    • http://gusevoxuzuwelap.mywebcommunity.org/sbi_bank_po_syllabus_2020_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_5fd18f409c375.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5fe08058caf61.pdfIn PDF document text
    • https://zinebogexorebo.weebly.com/uploads/1/3/1/4/131437984/1256626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369914/normal_5febca55a6196.pdfIn PDF document text
    • http://megidexabaror.mywebcommunity.org/21283105704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385009/normal_5fed41ecb1008.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/7185829512.pdfIn PDF document text
    • https://wubudebekezame.weebly.com/uploads/1/3/0/7/130740051/f273d7d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454556/normal_600a52b941b50.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
    • https://s3.amazonaws.com/xunilukegez/11701358208.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/31352296416.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/1440415249.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/canon_raw_editing_software.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/jumepujanaxuxif.pdfIn PDF document text
    • http://pudedenos.epizy.com/minccino_evolve_forms.pdfIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_292f08d4109840fbab565b03ce7982c6.pdf?index=trueIn PDF document text
    • http://jatugeset.atwebpages.com/cardiovascular_system_pharmacology.pdfIn PDF document text
    • http://rofixalo.epizy.com/70617299943.pdfIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_ef85a321c1624f63ad1708415a1f7805.pdf?index=trueIn PDF document text
    • http://fapizof.rf.gd/my_kenmore_ice_maker_stopped_working.pdfIn PDF document text
    • http://rejinivak.rf.gd/laboratory_design_guide.pdfIn PDF document text
    • http://bezananux.epizy.com/60792611145.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C4 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off000108b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 5564 bytes
SHA-256: c64b75645eb03c3cd446e5fb5686b2b8974d8b7c4577d9025fd754c72f219794
font_02_sfnt_off00011b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B87 11432 bytes
SHA-256: 7e1c4f7237469d68dc10c879705efb7de3f3ab1662bb4ce183738d5d8d16279b
font_03_sfnt_off00014260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14260 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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