Malicious PDF — malware analysis report

Static analysis result for SHA-256 67245635a41369e0…

MALICIOUS

PDF

76.2 KB Created: 2021-02-28 19:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: de30d5d5aeb96fb2370392961e27871a SHA-1: 4cf4e02cf4031987d7c90776d7549ac702663862 SHA-256: 67245635a41369e04241abad89d5b54c8e0505e15adb2c57c1eb46d1e3630a8f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, with one prominent URL pointing to a suspicious domain that appears to be part of an SEO link farm. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=newborns+in+need+st+louis PDF link annotation
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/mopivol-tapamaf.pdfIn PDF document text
    • https://lenololiwi.weebly.com/uploads/1/3/4/4/134455370/divolojomebidin.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/wopaguvuz_sewedanab.pdfIn PDF document text
    • https://paxepufa.weebly.com/uploads/1/3/4/6/134640660/bularaditegefibe.pdfIn PDF document text
    • http://bizewisa.iblogger.org/what_is_a_35_caliber.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/aula_internacional_1_nueva_edicion_ebook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pibasas.epizy.com/nfl_score_predictions_week_13_bleacher_report.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/figetuge.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/61722583426.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/34619327631.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/minecraft_captive_2_map.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/66660123117.pdfIn PDF document text
    • http://ribizotujigotok.rf.gd/27422802939.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/kuvasazasesovidiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/injustice_2_darkseid_combo_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/bermuda_bus_timetable.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/accounting_books_philippines_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/zokugiwil.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/tactical_aircraft_maintenance_air_force_bases.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_off0000f02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02A 4812 bytes
SHA-256: 528ab80559ac71b4fec486ee0caca302954b856f637119bc6983229f4aa86ce3
font_01_sfnt_off000100a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 10204 bytes
SHA-256: fa3592d66e84a8d3fcba6c89bf1fd159d9773c21eedfefea1982749c3e29d0d9

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