Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0268b552a20657c…

MALICIOUS

PDF

81.7 KB Created: 2021-04-05 01:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1a3cfd66e40feebd7a7d60d07a27757 SHA-1: d0e70364f6bec178e584061c7839b01a57a38924 SHA-256: d0268b552a20657c779096bbf85ad64833cb1c6218882fa7064943deba7d963d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm pointing to potentially malicious content. The ClamAV detection and ML classifier further indicate malicious intent. The embedded URLs suggest an attempt to redirect users to phishing or malware-hosting sites, likely as part of a broader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=c+code+formatter+atom
    • http://meetchat.space/3846548050163lqi.pdf
    • http://wojesukuzak.mygamesonline.org/toeic_vocabulary_test.pdf
    • http://bahis-sikayet.com/element_crossword_puzzle8p36z.pdf
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/milerewozowa.pdf
    • http://1fps.ru/bosajagolulafowasubitd50f5.pdf
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/2309347.pdf
    • http://cookwellbakewell.com/how_to_clear_caller_id_on_vtech_phone2nsck.pdf
    • http://pavozuketogo.mygamesonline.org/biot_savart_law_examples.pdf
    • http://pelabinowoguk.getenjoyment.net/59210403530.pdf
    • http://mastera-saydinga.ru/jemosoxigefektli6w.pdf
    • http://lozuzaragujeb.mypressonline.com/attack_on_titan_season_3_opening_song_name.pdf
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/db48e4da005b.pdf
    • http://xemakaze.mywebcommunity.org/big_ideas_math_algebra_1_answer_key.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/faxaxos/beats_by_dre_font.pdf
    • https://s3.amazonaws.com/semuxemakaw/gongsun_zan_three_kingdoms_guide.pdf
    • https://s3.amazonaws.com/gazivemon/baby_tamil_movie_all_songs.pdf
    • https://s3.amazonaws.com/numegubowalonan/22947533115.pdf
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_a0e26029c4b145cabe66616686657c73.pdf?index=true
    • https://s3.amazonaws.com/kikunojulejuj/the_latter_and_former_translation.pdf
    • https://s3.amazonaws.com/ratixifo/90806037417.pdf
    • https://s3.amazonaws.com/tanikanaw/what_does_having_spiders_in_your_dreams_mean.pdf
    • https://s3.amazonaws.com/sitozi/fagejusof.pdf
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_bc80c081c9b145e79ac853912d9b9725.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed0c.bin
2e85bf8663c87addd94672c667c3f3796ef08cbb601900963ea703ce72867fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED0C 4860 bytes
font_01_sfnt_off0000fd77.bin
d0ab359eb6afb7acf51cf3c946d2b23522a7c543b98cb1ce508fec567c6cd4aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD77 11436 bytes
font_02_sfnt_off000124ad.bin
ce90dcb8f80a691a226d66d7b9fb40db13b52946125f6d312f8860abae454107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124AD 16084 bytes

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