Malicious PDF — malware analysis report

Static analysis result for SHA-256 18414fc720fa4670…

MALICIOUS

PDF

68.5 KB Created: 2020-12-15 07:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a5913bd9d0b7e2bfab8452862507a758 SHA-1: 7f1723bb71c566c941a52422ea20a885f8838b6e SHA-256: 18414fc720fa46704d3cd42f5ab80f684275ad8795e2ed67d0d01cbae242d818
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external links suggest a link farm or phishing attempt. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffine.ru/123?utm_term=community+based+social+marketing+training In PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/kanemusurupow-mogoseru-kinufi.pdfIn PDF document text
    • https://fiduwovizeget.weebly.com/uploads/1/3/4/5/134517619/66e9496d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5f9172abeb47c.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/8735811.pdfIn PDF document text
    • https://xakuwije.weebly.com/uploads/1/3/4/3/134340554/8f695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6beaecb936d6a06a4c2a9/t/5fd6207089566e781f474e79/1607868529524/deus_ex_mankind_divided_strategy_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc140152cf09257bd6e62db/t/5fc558373570fb44d1b4a5f9/1606768696009/43174048627.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/digosamegamaga.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/13357321860.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6763d68612547ed8438d4/t/5fcd7444e43f2b00a8bdba00/1607300167169/72040692872.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc654295687f52b6ba616b7/t/5fc9b707414f5e352377fe3a/1607055111402/animal_crossing_pocket_camp_villagers_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc532fde2fce462bca7fa8a/t/5fcd1037d235d37878caf769/1607274551893/cnc_s_taper_free_download_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15943ea4a794d56482977/t/5fc3f8eda97599144e732f3e/1606678766376/simcity_4_cheats_not_working.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb205e8e827d4288adb3/t/5fc429685147b14804b647f4/1606691177703/77391546108.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_off0000ce01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE01 5472 bytes
SHA-256: 9ee376d122197b5e78f29bd8e0b68f1b1839232fb5996b8eeb22a6d37d91c2f1
font_01_sfnt_off0000e085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE085 10632 bytes
SHA-256: 8f992522e5d145351f45e98325f2d9911d9bed264e7dc2e8af79d2f0190acc63

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