Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b237f4727e35c34…

MALICIOUS

PDF

80.6 KB Created: 2021-03-26 06:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 82f9e3bff3e6d305bc9f987a9c81774e SHA-1: 5754095866287ec12291b5fab7631ec705613060 SHA-256: 4b237f4727e35c3483924e0789c52d539008c4cc849465beccd6099cdc365726
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malicious content distribution scheme, as indicated by the presence of a large number of external links, many hosted on disposable domains. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to harmful content or facilitate further compromise. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a tactic of creating a link farm to distribute malicious payloads or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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://ponafet.ru/wix?keyword=ghost+world+pdf+download PDF link annotation
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/f8d3640b7ad7c6f.pdfIn PDF document text
    • https://dowozazufexu.weebly.com/uploads/1/3/4/6/134606261/9672844.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/2685329.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/jodidoxefoberex.pdfIn PDF document text
    • https://bilezebije.weebly.com/uploads/1/3/4/3/134344171/7884f5a597dbd.pdfIn PDF document text
    • https://sedonefuwetupo.weebly.com/uploads/1/3/4/6/134669082/9640842.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
    • https://755d026c-fd58-4633-9ca9-8af24261f473.filesusr.com/ugd/4622eb_1e75fd32e05342568b575ec02c2fb7c0.pdf?index=trueIn PDF document text
    • https://e668d0bc-6b9c-4787-ac64-5363b724ef62.filesusr.com/ugd/6ec699_81f15767513745e6be34eda2718abe3f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81df5390-987e-4f40-8920-34ffab0065e7/kenmore_elite_microwave_model_721_light_bulb.pdfIn PDF document text
    • https://321e46d8-a3e9-4523-905f-b0dcd1dcb7ef.filesusr.com/ugd/29fbc3_0b33b84ca71e484889cec496b6ce5028.pdf?index=trueIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_118b327b1b594314967190f5c7631478.pdf?index=trueIn PDF document text
    • https://e31b828f-dd5d-4b35-abba-5777d5fc2ed6.filesusr.com/ugd/56a8cc_57964545b7824436ae1b68649f2e390a.pdf?index=trueIn PDF document text
    • http://doriponesarom.myartsonline.com/full_body_stretch_routine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31b06199-2110-44e3-921a-9d8e8c0628ab/losixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd73d6d0-efee-45f4-8d44-d320ed649d52/doubledown_casino_app_store.pdfIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_daf17d22ce674617b0eb55c46a11a7c8.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_3f100ad75e5544e18babb8bf60869d3e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02581d01-8462-4ea2-a2f0-7aa175ecb821/does_walmart_sell_pulse_oximeters_in_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d3bbe2-c05e-4ad3-a317-5b4ddc1cd690/troy_bilt_pony_tiller_belt_replacement.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_0ad5394fdfdd4ba29a492cb9472f61d0.pdf?index=trueIn 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_off0000e9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AF 4872 bytes
SHA-256: e8d45c541c9f50183b0127e0ff40fc9dea6047c6256aee3a6009c94c84ed1e0c
font_01_sfnt_off0000fa3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3F 12876 bytes
SHA-256: 3ab1a77f432519cdcf6a634d604040ab9e9eed8fa675efba7c3e945d9b23b7a2
font_02_sfnt_off00012558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12558 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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