Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c558e1e929ac0c…

MALICIOUS

PDF

76.4 KB Created: 2021-03-20 02:32:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 953a3ad0f57efe2725dc12e209947726 SHA-1: caa5e05adf059676ec0ed6a623bc320ab5839d0f SHA-256: 04c558e1e929ac0c3d71185023bdf0ad16f1c47995791f7effe1ba7bbf71a6fe
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malicious download attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs point towards a malicious workflow designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/award?keyword=how+to+convert+apple+book+into+pdf PDF link annotation
    • https://cdn.sqhk.co/rewakevutel/igeWohb/open_secure_folder_s10.pdfIn PDF document text
    • http://letxxnx.org/cuales_son_titulos_de_credito_en_mexicoiky15.pdfIn PDF document text
    • https://fujemolubese.weebly.com/uploads/1/3/4/0/134012375/bigawokukaritizir.pdfIn PDF document text
    • http://afracheat4.xyz/1960_johnson_seahorse_10_hpimiuv.pdfIn PDF document text
    • http://gegebafebofad.scienceontheweb.net/what_fast_food_places_are_gluten_free.pdfIn PDF document text
    • http://iranianvc.com/21940784547rkct6.pdfIn PDF document text
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/remodawisojamud.pdfIn PDF document text
    • https://bitilidejiv.weebly.com/uploads/1/3/4/4/134442737/zamuretijesibi-fuzotoluxiv.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/9he4Bje/raft_survival_simulator_unblocked.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/76789055006.pdfIn PDF document text
    • https://cdn.sqhk.co/xaduwudixum/jdZnhig/swing_shift_movie_soundtrack.pdfIn PDF document text
    • http://philonio.online/hp_elitebook_8570p_date_de_sortierloz3.pdfIn PDF document text
    • https://tisawisapapaw.weebly.com/uploads/1/3/5/3/135326074/pebabararumef.pdfIn PDF document text
    • https://cdn.sqhk.co/visobipibe/1dhcqhc/netflix_movies_apk_download.pdfIn PDF document text
    • https://wijuluberaselak.weebly.com/uploads/1/3/4/0/134016921/5fbbe6f55d.pdfIn PDF document text
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/cdf163b680cf.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/CVClhgi/zakimiribi.pdfIn PDF document text
    • https://wezunemoxojo.weebly.com/uploads/1/3/5/3/135321606/d5b5dfe2381a794.pdfIn PDF document text
    • https://pudawiwut.weebly.com/uploads/1/3/5/3/135342926/tokawe.pdfIn PDF document text
    • http://zootime.store/43085878598i2izs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dapekafuxururo.myartsonline.com/73170729316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be7ff47-0d6f-4b3a-acf2-a96253bc9993/what_are_the_modern_literary_theories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cfa2726-37d9-4584-8c99-d67b1a3e819c/fivebasojisujetimebufe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 5288 bytes
SHA-256: bbf7dc067fbe891daf267965b489a7df1fd3a4f6f8686748a1946763054e1a6d
font_01_sfnt_off0000ff40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF40 10828 bytes
SHA-256: c77d2244874f6552dd72b3005f718e69709646aafe9523749e8202ac933899db