Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ae8acb29f5933b…

MALICIOUS

PDF

84.3 KB Created: 2021-03-21 12:07:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: fe841346b019c8f13caf72dba9605e15 SHA-1: 96b5273a048792bf4cf3023736d043a7dba37107 SHA-256: 03ae8acb29f5933b7188cfd45fa4f307682461ca41cf206fc3dddeea1ca50a2e
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/wix?keyword=eritrean+women%2527s+day PDF link annotation
    • http://xawegap.mywebcommunity.org/futibibozivimik.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/gRc6pmT/movistar_plus_gratis_smart_tv.pdfIn PDF document text
    • https://zenisitidijo.weebly.com/uploads/1/3/4/3/134309999/mopuwe-mitap-bopunubamobe-sirubodopivoja.pdfIn PDF document text
    • https://cdn.sqhk.co/numorolele/eqA3y3R/maxpreps_softball_rankings_illinois.pdfIn PDF document text
    • http://govuxojikasumot.scienceontheweb.net/41020373514.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/ieiyjaR/25552768250.pdfIn PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/017df50f154.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/ak5jifw/53941154169.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/jj8CYgc/country_music_singers_male_pictures.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/44992750746.pdfIn PDF document text
    • https://cdn.sqhk.co/tasaxasup/dmHhcbk/32730294260.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/a_fair_days_work_meaning.pdfIn PDF document text
    • https://sixutaxujarupi.weebly.com/uploads/1/3/4/8/134882582/rimenugobopiki_kuzimona_pekeduxemuva.pdfIn PDF document text
    • https://tekaxudifen.weebly.com/uploads/1/3/5/9/135992886/1056254.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/5vhcFib/epsxe_bios_file_free_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/cijxgg9/dajagofutinomuxalisipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wevibek.rf.gd/12159439704.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/21032672130.pdfIn PDF document text
    • http://rixupod.rf.gd/baldur_s_gate_descent_to_avernus.pdfIn PDF document text
    • http://tedumadedin.epizy.com/fender_rumble_100_v3_bass_combo_amplifier_review.pdfIn PDF document text
    • http://dazewedoxagaxaz.epizy.com/40299772428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/747b1fda-6161-4c02-b099-f46fc1546320/26456194586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076225dc-1ef3-4a45-9f15-936e00f78775/tesosefikedexomejalosuxi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD90 4912 bytes
SHA-256: 1215dd9757d2f7f3ef9407bcca9ff44f7dcd238e4bcece28a91bdd2165f536d2
font_01_sfnt_off00010e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3D 11100 bytes
SHA-256: b5f5ab40fc65aa3b38b786ed61c0e2e0ce4af0c95662a74abd97c9d7f1448a29
font_02_sfnt_off000133ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EC 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230