Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ad48041563016d…

MALICIOUS

PDF

78.4 KB Created: 2021-05-11 02:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fe99bf2f351d3a7b0262148ca56a908c SHA-1: 6888fa5fdc5e9772cc148f7c67eee49db64eae62 SHA-256: 32ad48041563016dbd9cc718b804922eb05ab483bcf3cc4ee604b56f62896086
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a link farm on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://golowaki.ru/strik?utm_term=ram+1500+mpg+while+towing PDF link annotation
    • https://zarujiwimil.weebly.com/uploads/1/3/4/9/134900424/2072230.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/diabetes_diet_chart_in_urduhsxaq.pdfIn PDF document text
    • http://xibiselid.medianewsonline.com/linear_functional_analysis_for_scientists_and_engineers.pdfIn PDF document text
    • http://reduslimer.website/minnesota_drivers_manual_worksheet_answersouomc.pdfIn PDF document text
    • http://dagefose.22web.org/black_hat_hacker_mask.pdfIn PDF document text
    • https://misiwutikamiba.weebly.com/uploads/1/3/4/6/134601431/2a17905b4.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/un_curso_de_milagros_leccion_31m6u9c.pdfIn PDF document text
    • https://wubudebekezame.weebly.com/uploads/1/3/0/7/130740051/tamorubotefe_ravexovewisewov_rijalekokazewik.pdfIn PDF document text
    • https://bopuzujofegif.weebly.com/uploads/1/3/4/6/134655301/8579376.pdfIn PDF document text
    • http://jopikop.22web.org/38369683938.pdfIn PDF document text
    • http://pikufufunuti.scienceontheweb.net/6893523432.pdfIn PDF document text
    • http://pl50off.info/concierto_aranjuez_full_scorevdxn2.pdfIn PDF document text
    • http://dayzcommunity.info/format_allocation_unit_size_meaningjwa7l.pdfIn PDF document text
    • http://litowume.22web.org/how_to_teach_angles_in_parallel_lines.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/hciagfS/battle_of_warship_mod_apk_old_version.pdfIn PDF document text
    • http://keysecret.ru/what_is_a_peace_offering_in_the_bibleq39rl.pdfIn PDF document text
    • http://yatvoyya.fun/lg_top_load_washing_machine_bleach_dispenser_not_drainingde4o9.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/TJgjhfZ/monkey_madness_2_quest_guide_osrs.pdfIn PDF document text
    • https://jososipiwudamuw.weebly.com/uploads/1/3/2/7/132740918/komogamovijugi.pdfIn PDF document text
    • http://wedurorokim.mypressonline.com/encyclopdie_marvel_universe.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://xutewedosobu.rf.gd/28143039541.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_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 5164 bytes
SHA-256: 1ed5f106d4cc648638559365a6bafc454311e3915620be53f6063dcddda3bfdb
font_01_sfnt_off0000f9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C7 10620 bytes
SHA-256: df49a92a95930037cfa29e5df717fbc98b410f7d06b35a4c8c95603496822563
font_02_sfnt_off00011df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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