Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd297795a2604a0…

MALICIOUS

PDF

79.6 KB Created: 2021-04-02 06:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 602b2d368d2da78d844cabcb6d3a5287 SHA-1: 5ee806ff93aaa6a6c1fc214d90a93e2d1e973303 SHA-256: 6fd297795a2604a031b0f8b72a318222115b2f8d4debd5d4d4ac8f6728c73047
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 0.9996

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://nipisod.ru/aws?utm_term=how+to+do+chest+workouts+with+resistance+bands PDF link annotation
    • http://lifegirls.site/factoring_trinomials_ax2_bx_c_answer_keyhw8nb.pdfIn PDF document text
    • http://promoocaoameericanas.com/what_are_union_contract_negotiationsr8b98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378149/normal_60027e9c96374.pdfIn PDF document text
    • http://lovepositions.info/35018669101h61tb.pdfIn PDF document text
    • http://digitaltoolsfor.xyz/costume_jewelry_rings_etsyfyxeq.pdfIn PDF document text
    • http://coolvdomaion.online/24949256180j6v3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482406/normal_605464733b5f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460688/normal_5fc7cffc44a7f.pdfIn PDF document text
    • http://itawegan.fun/830605070533vp4y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/nitrogenous_fertilizers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc29f9e-4c0b-4e6d-9add-b7559bf91abd/is_epix_worth_getting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38649eb4-ca91-4976-bb42-da616760f2e3/multiple_intelligences_gardner_1983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7957fe-5260-4843-8d75-038e457606a6/veg_recipes_of_indian_moong_dal_fry.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/jojo_moyes_me_before_you_book_summary.pdfIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_2a33536efb0240d7a9588d4e0b710d47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dupula/lilly_medicare_answers_patient_assistance_program.pdfIn PDF document text
    • https://182222a4-a7a4-434f-839c-7103b506edb5.filesusr.com/ugd/224a67_794d874570d34cfb96be5149b6b0d3a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuzamada/kindergarten_math_worksheets_addition_and_subtraction.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_acdc90fc54b94e7390b4b339f7a32364.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/42612e75-406c-4780-92b0-e34473d9fe83/how_many_oil_pipelines_have_leaked_in_the_us.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/target_fieldcrest_sheets_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c5fa611-9c59-4346-9110-99cde551f49b/88391388453.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_off0000fa0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 5252 bytes
SHA-256: 61e70919456209d3c22dfcf5964f11702ed325e6d4342365bb41b69eeecac7bf
font_01_sfnt_off00010bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF0 10700 bytes
SHA-256: b7954ee6f38f70fbeae85246f353082a1239be99aa8614fe0bc27bf2128c9a37