Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2618a0c63270e3…

MALICIOUS

PDF

90.2 KB Created: 2021-04-05 04:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d37f65dc88a445fd80886ae0453d1641 SHA-1: 4c795a80ffc719bc5e2b17e4d89a4b2e008b149c SHA-256: 3b2618a0c63270e35f5552d6b45237ca973a96a72bc1feb3f2f1e2e5578e7fec
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://pelibifir.ru/strik?utm_term=english+grammar+rules+pdf+gradeup
    • https://cdn.sqhk.co/perigupa/WF49ija/80490848071.pdf
    • https://cdn.sqhk.co/bepesewutu/bqiTjaR/game_launcher_creator_v2_free.pdf
    • http://fortuneo.biz/citizen_promaster_navihawk_gps_black_super_titanium00v1r.pdf
    • https://cdn.sqhk.co/rapowipijes/xxUihLN/ncaa_free_throw_line_distance.pdf
    • http://cmb-accueil.com/91700111064iuj8k.pdf
    • http://omoikiri.info/54971716562chha4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/316590a4-52d8-4a39-9f4a-62e8b871ec2c/wulaxuradunasekota.pdf
    • https://uploads.strikinglycdn.com/files/20773f04-9074-4924-904c-b6250347880e/how_to_fill_air_force_x_group_form.pdf
    • https://uploads.strikinglycdn.com/files/6666ecbd-095d-4727-941a-acfcefdd8316/hallmark_twas_the_night_before_christmas_pop_up_book_1988.pdf
    • https://uploads.strikinglycdn.com/files/f063d8b4-ff0a-49f5-87a7-0e7b68ef40bb/85103686657.pdf
    • https://uploads.strikinglycdn.com/files/26c997e9-e19f-4f69-8a89-f538eec6bcc5/79792110957.pdf
    • https://uploads.strikinglycdn.com/files/684ccf73-40a9-455f-83f8-649083fab409/how_to_remove_trim_switch_from_throttle.pdf
    • https://uploads.strikinglycdn.com/files/2d830396-68b7-485f-8828-988768db9c8d/57084375249.pdf
    • https://uploads.strikinglycdn.com/files/31c89781-1266-4cd0-a707-04708c854f8b/66541514789.pdf
    • https://s3.amazonaws.com/rubidokezive/mofam.pdf
    • https://uploads.strikinglycdn.com/files/48ed2675-45f4-4b16-a1b1-39a80b116194/video_games_ps4_free.pdf
    • https://s3.amazonaws.com/falevi/bakugan_ps2_rom.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012202.bin
8445f3dbbe02d1e087b5b29cf1b8ff2c1f1b5edd33a1568f1b04eb27414d45bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x12202 5412 bytes
font_01_sfnt_off00013443.bin
f3e97c4279afd99c6ca52f7373ad205be553cb3fdab5959aba76ee1b438883d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13443 11584 bytes