Malicious PDF — malware analysis report

Static analysis result for SHA-256 34afd55463ec649e…

MALICIOUS

PDF

78.6 KB Created: 2021-03-23 18:55:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dc70342c5f43c71f16ebcffe92a1bca1 SHA-1: b1559f5247c19512563c9847e81ac3d655de161b SHA-256: 34afd55463ec649e718f45dce16718644318ba3d779a2d3fe3b6e971d8483e95
156 Risk Score

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 0.9998

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
  • 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://gimoguvi.ru/wix?keyword=certificate+template+google+docs PDF link annotation
    • http://mumolazesinidix.getenjoyment.net/zerajedubikorubof.pdfIn PDF document text
    • http://leyloften.online/55951906849cm09p.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/239fcfe58c61.pdfIn PDF document text
    • http://tuzevijubozor.mywebcommunity.org/cardio_gym_workout_plan_for_beginners.pdfIn PDF document text
    • http://kurixuj.sportsontheweb.net/math_problem_solving_grade_2.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/black_and_decker_crisp_n_bake_air_fry_toaster_oven_reviews.pdfIn PDF document text
    • http://mpvideo.org/casio_baby_g_mens_watchesnsbyx.pdfIn PDF document text
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/lavijuni-dewutirazorub-rurux-getugokopenum.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/xutevoxage.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/jakujakula/degasezemufizir.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/nomepakosado.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/brazil_amazon_river_information_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/mazda_aio_android_auto_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/30987047974.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/viva_video_editor_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/which_fear_is_the_most_common.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/rd_burman_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/4_horsemen_wow_vanilla_guide.pdfIn PDF document text
    • http://wizigipixe.atwebpages.com/arthashastra_in_kannada_free_download.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_off0000f745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 5380 bytes
SHA-256: 5b4cd911965e96a7d5a090f9b59b2c153a5783c2d1e0ecf97dd275a90e1ad315
font_01_sfnt_off00010971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10971 10604 bytes
SHA-256: 2af8370e29482414b01c5483ae8ae20ae3dcc57cf6bdfd8adec62c92b52108a8

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