Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc37f18fdea82378…

MALICIOUS

PDF

79.0 KB Created: 2021-06-12 09:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 833cbf63072842168c1fbea7e1d9f822 SHA-1: 40b3e352c4f2722155b3b680cc0239cbbd4974e1 SHA-256: fc37f18fdea8237819eb5e60984428aa8735d49f12b7cfec6f94fffdf03dac04
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, with one specifically pointing to a URL that appears to be a lure for a free PDF download, likely leading to a malicious site. The PDF's structure and embedded content suggest it's designed to exploit users seeking specific information, a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://philabc.ru/pbw?utm_term=quran+in+marathi+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375206/normal_5fd1711275460.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4369498/normal_60b19f9f376d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_60596e8fb7a79.pdfIn PDF document text
    • https://jojawetoterul.weebly.com/uploads/1/3/4/4/134404105/ludirizoti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_604e752291d7a.pdfIn PDF document text
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/4a8762283.pdfIn PDF document text
    • https://zurenigexozaxil.weebly.com/uploads/1/3/4/6/134606750/23d974a9d0766c9.pdfIn PDF document text
    • https://bafewalu.weebly.com/uploads/1/3/5/3/135350628/fodur_samibuxi.pdfIn PDF document text
    • https://sijerixo.weebly.com/uploads/1/3/4/0/134042725/08755b312ed.pdfIn PDF document text
    • https://zujususo.weebly.com/uploads/1/3/4/6/134615591/lowuke-tuwepowenitug-jizabawo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413227/normal_6000d9ceef162.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://taxexuwej.pbworks.com/f/actividades_con_figuras_geometricas_para_primer_grado.pdfIn PDF document text
    • http://gitizuxob.pbworks.com/f/43470644495.pdfIn PDF document text
    • http://zixereves.pbworks.com/f/libros_nutricin_deportiva_fitness.pdfIn PDF document text
    • http://fijovolumi.pbworks.com/f/50834010504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e6f0c0-9691-4057-9344-4bf1bb43e3de/what_is_example_of_commensalism_in_the_tropical_rainforest.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144522432/1567535652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95c2780-0607-499b-92c4-1fa1bd8568b5/nordictrack_c900_pro_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3993ed-6fe8-40b0-bf7a-2c9fb3e322f2/sitobufagiwatola.pdfIn PDF document text
    • http://faxamom.pbworks.com/w/file/fetch/144602343/skyrim_how_to_see_werewolf_perks.pdfIn PDF document text
    • http://juzifezazuk.pbworks.com/w/file/fetch/144886419/pixotapuzubud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/576b3d8c-7c19-42b4-8654-7835c82cf2e6/pexodenitiviwax.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/145107048/deadpool_free_stream.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010989.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10989 17584 bytes
SHA-256: 9e30fed4e6d9e63197e1103f6b6ce015a54e041cdd3ddb24c2d3b91e9a2186fe
font_00_sfnt_off0000d376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD376 5256 bytes
SHA-256: f534654484ca674b27f5f0f07aa036114630cfbef3199a33b4e8739f63703107
font_01_sfnt_off0000e53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53F 10976 bytes
SHA-256: 31e572aa633d11101df1eab0fd6a27b324ea09ea3d0dc206de942afb75d360da
font_03_sfnt_off000123fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FA 2408 bytes
SHA-256: a8325b7f25e0dc7606887f7328bcac675e6ac44251ac06d6593804999c35411a

Open this report in the interactive analyzer, or submit your own file for analysis.