Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f18216a67c5382…

MALICIOUS

PDF

87.1 KB Created: 2021-05-29 07:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 50a41e4b9ca70a70f3368d17e3120886 SHA-1: 0d2a444db9f577c0b697ce628c6a48b3620b97ec SHA-256: 03f18216a67c5382ee972d4e8ae3293ff24ebd574ca0c8a307da0f2c60e402a5
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/strik?utm_term=descargar+papita+mani+toston+2+dvdrip PDF link annotation
    • https://jakidanumamew.weebly.com/uploads/1/3/4/8/134881834/fuvoj-watamabumo-dudurazakopiler-vimifupuno.pdfIn PDF document text
    • https://simovisebosa.weebly.com/uploads/1/3/4/6/134649932/136f5c99.pdfIn PDF document text
    • https://pusasosabuni.weebly.com/uploads/1/3/4/6/134654602/fogezepi-xixavenesisid.pdfIn PDF document text
    • https://rolemefusibo.weebly.com/uploads/1/3/0/8/130814279/nijixelevazorago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_60654908aa177.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/e9f15faded7.pdfIn PDF document text
    • https://tozobaveje.weebly.com/uploads/1/3/7/5/137501006/523452.pdfIn PDF document text
    • https://rivixemip.weebly.com/uploads/1/3/4/6/134609840/627121.pdfIn PDF document text
    • https://biroputasore.weebly.com/uploads/1/3/4/7/134747039/e19ac4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366029/normal_60024a6773777.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://uploads.strikinglycdn.com/files/4bbaae65-a5e2-49ab-9419-1fac04cb1c4d/avancemos_3_unidad_5_leccion_1_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a30571-4710-4117-bcc9-4f2c2c528e76/zexagoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d54402ef-e49b-44dd-ac06-b16581f9f667/radilumewasulovisosudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/601bd6ab-ef76-48f5-8394-89c3ecad41d4/rozolanomarenunimezupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb5233d-6add-435c-8518-fe5c06180576/39689432582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc34a25-ed0a-411a-a173-fa9c30ac3f77/bizurusaxonika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2bb98b5-f2db-4fe1-b611-5600ae42d073/48803931561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad575951-2115-4f40-bf2c-ec43d98e8780/nanodrop_8000_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd92c15d-d73f-437b-9159-eea9abd5b206/lajegikosuvikesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0a12e4-795b-4ce6-9cf5-e31755d12c1b/3666901763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a59c400b-608e-4c46-abb5-4c1183741008/78053731412.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0C 4712 bytes
SHA-256: cb02d823705254fb756c8bde560be39d65aa410567ae4dbcdcc7516102ec2da9
font_01_sfnt_off0000ef79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF79 5340 bytes
SHA-256: dfecff4c7a370dc86090e07f2f4aaf2e5c545dbfe94d00c86f08585474e0051e
font_02_sfnt_off00010190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10190 11916 bytes
SHA-256: d383d2e9007a61b1fa64d46f91950f410852780c553ca3ce1ef0b801f08f4e3b
font_03_sfnt_off0001286b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286B 16364 bytes
SHA-256: dff3e64d66f4f72d357589f6a1b01fe7401ddea06796e86da601c80718189d28
font_04_sfnt_off00013e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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