Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ae37d23524c405…

MALICIOUS

PDF

82.3 KB Created: 2021-03-08 18:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abae2163971aeec1f2e576efb60aa4ca SHA-1: e4d08a0c14853d86bdc52f78cbd00fed4e9a8281 SHA-256: 62ae37d23524c405b91e51ab910b7b1ca4bd35cd5e13a20026ef0b4b30cce451
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are likely part of a link farm designed to deceive users. The primary malicious URL identified is 'https://ponafet.ru/strik?utm_term=booking+tattoo+appointment+online', which is likely used for phishing or to host a secondary payload. The presence of numerous PDF links and the ML classifier's high confidence score indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=booking+tattoo+appointment+online
    • https://rajiketuwomap.weebly.com/uploads/1/3/5/9/135957261/8553855.pdf
    • https://cdn.sqhk.co/rovifatira/q7hfhfN/nova_launcher_prime_apk_uptodown.pdf
    • https://cdn.sqhk.co/zudipoje/h2tVja9/best_doodle_halloween_costumes.pdf
    • https://cdn.sqhk.co/womilepeba/VjMhgij/the_trip_to_greece_finale_review.pdf
    • https://nererudufujodu.weebly.com/uploads/1/3/4/3/134321338/gepeduj-duxawijaf-vasof.pdf
    • https://majabowuji.weebly.com/uploads/1/3/6/0/136092793/d715977e87.pdf
    • https://ropedali.weebly.com/uploads/1/3/0/9/130969406/daperi.pdf
    • https://wekowegalovu.weebly.com/uploads/1/3/4/6/134668649/8328b8e4.pdf
    • https://cdn.sqhk.co/dijogiper/Yid3ibu/95774583245.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a5dbb730-5a57-4123-9fce-b34d3fd4cf8c/how_to_have_a_better_relationship_with_your_boss.pdf
    • https://uploads.strikinglycdn.com/files/203a4d37-abbb-4d0c-9fa7-9fabbe166f2b/81468500194.pdf
    • https://s3.amazonaws.com/zikeko/daruviwitewifido.pdf
    • https://s3.amazonaws.com/lowuwofuxali/koxexa.pdf
    • https://s3.amazonaws.com/mexijegedakol/rukmini_babu_audio_song.pdf
    • https://uploads.strikinglycdn.com/files/aa258216-f3b7-489e-8d4c-9da199b6f8b2/91207941638.pdf
    • https://s3.amazonaws.com/fazujo/against_the_sun_full_movie_300mb.pdf
    • https://uploads.strikinglycdn.com/files/10dc79e2-a44e-4d47-8cd2-3aa43d0fda8b/nepeberodekikofaw.pdf
    • https://uploads.strikinglycdn.com/files/25741ee6-2841-415f-9a8e-14ca56479e04/49645376287.pdf
    • https://s3.amazonaws.com/rogugagatuf/febrile_seizure_guidelines_2017.pdf
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f915.bin
6a394fa948e6aa7d77526967c8716aa6cea538f08ebae304e8665fe870412005		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 4768 bytes
font_01_sfnt_off0001092e.bin
209a1148bfe87b8750895d7f5d520b056d04a3624481bce2af294960c04d0365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1092E 10660 bytes
font_02_sfnt_off00012da2.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA2 4324 bytes

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