Malicious PDF — malware analysis report

Static analysis result for SHA-256 118cf29168b5e192…

MALICIOUS

PDF

70.9 KB Created: 2021-03-24 03:09:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 11b74e42fdd97224dafdcf4a4e0d0fa5 SHA-1: ea7512b3f15e776daef28393df937894cc8f7160 SHA-256: 118cf29168b5e192dfeadad68d6cdae11f7a186af8687a42e58ccaf62e48708e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://bologen.ru/wix?keyword=journey+to+careers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487186/normal_5fec1acf12708.pdfIn PDF document text
    • http://counterman.ru/power_of_positive_thinking_in_hindiqt3dz.pdfIn PDF document text
    • http://sparzha.club/power_pressure_cooker_xlrqrag.pdfIn PDF document text
    • http://lnstagram-helps-contact.com/88603925095p34ti.pdfIn PDF document text
    • http://dimax.website/text_structure_examples_5th_gradeeszse.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_6001868b41548.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/botodexotakuxati.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_6043bf1bcc7a4.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/73757454558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403264/normal_5ffa0a4aee76e.pdfIn PDF document text
    • http://onlyforyou.space/hypercalcaemia_of_malignancy_guidelinesfib0w.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/da9e52a7-78e9-46dc-a828-26b93a58e869/ravpower_filehub_wd03_review.pdfIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_0986f222093e44d58c43e1f5219f79da.pdf?index=trueIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_40b2a11980e0428490ac0f278292cdc5.pdf?index=trueIn PDF document text
    • http://xawiwevivuzox.onlinewebshop.net/lofezi.pdfIn PDF document text
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_69c17a1a5c294f968ca6d3b593b30c58.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/849da613-e309-430e-8203-476a6e77ed71/martin_luther_king_famous_speech_youtube.pdfIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_4249650599f14926a24e3d042e65fddc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22f67b3a-3a12-4546-9459-a7b3b1e0df5a/can_you_make_money_house_flipping.pdfIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_efee548e381644e1a7328120d039a215.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/80cf34f9-73f1-4d86-b9ac-8d1f48c172f3/ryobi_2000_psi_pressure_washer_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1220b7-afd0-4aa6-9b2b-df3c56334dc5/57743388840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d35a1e-48e5-42f6-880a-9551df879dcb/natigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4844815a-87c7-44cd-8c94-0b6d7fad63a3/que_es_enseanza_segun_autores.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_off0000cc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4E 4684 bytes
SHA-256: 0c97dcef2ec704ca5f202e6984f4f9b219d1a94693e750c98a9392c81d2355d8
font_01_sfnt_off0000dc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC44 10564 bytes
SHA-256: 26f1ad3db16af6fa73298a3626650d7a6241262f339bf6bd5ae69a195591273b
font_02_sfnt_off00010068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10068 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2