Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf02b457a340d08…

MALICIOUS

PDF

75.4 KB Created: 2021-03-24 09:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a367b987a5b05f4a917bf3dbaff5e037 SHA-1: 91e0d882952176a9b43c76adf79e519e842a084d SHA-256: bdf02b457a340d08c8c0eaf8dfd92b022e3af78fabb471a3a6de1818dc73fa77
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated, indicating a link farm or phishing attempt. ClamAV detected this as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, contains references to 'Frankfurt airport layout pdf' and 'wkhtmltopdf', suggesting a lure to disguise malicious intent. The presence of numerous external links points towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://golowaki.ru/123?utm_term=frankfurt+airport+layout+pdf PDF link annotation
    • http://rolopigabetitu.scienceontheweb.net/acknowledgement_for_narrative_report.pdfIn PDF document text
    • http://nodefiw.medianewsonline.com/46867067357.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/dofamavaxijagiparedida.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/pegelonez.pdfIn PDF document text
    • http://xuforaxi.22web.org/how_much_does_a_navy_seal_make_in_a_year.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/3196792075.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/1000_places_to_see_before_you_die_united_states_checklist.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/fighter_diet_food_plan.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/jivala/87653681053.pdfIn PDF document text
    • http://bexumasifawej.epizy.com/vafirejimijazumavef.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/93559289598.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/1694668735.pdfIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_ee61b1c7460949da8da6e6aabe3e4169.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patilawasu/call_recorder_app_for_android_without_beep.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/52834557847.pdfIn PDF document text
    • http://toxodetu.rf.gd/film_minions_2015_subtitle_indonesia.pdfIn PDF document text
    • http://rodexiguv.onlinewebshop.net/kevupugajovejug.pdfIn PDF document text
    • http://zadizufosa.rf.gd/warrior_leveling_talent_guide_classic.pdfIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_725a706ade4f46dd9e4f27a1ff05ac30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujapu/hunted_2012_tv_series_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/94944881044.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_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 4980 bytes
SHA-256: e90b0894e4330e5fb8d447a59b1e47537cc2d4daedfa0614edac5a996a8c5bd1
font_01_sfnt_off0000f9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A8 11260 bytes
SHA-256: 74b803d8c723216b7cb91c983b40d5154744a2de795a95de56e7c1374a0ff64a

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