Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d8ffed68eebfb2…

MALICIOUS

PDF

172.3 KB Created: 2021-03-14 15:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 22723d090a3044215203d1c4dfc82d6e SHA-1: 5a90f37773865f4b7d7d948cdcac16d7021a687c SHA-256: f9d8ffed68eebfb26bb165268732140904e8168182d119519df4948daee13dc2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9977

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://gimoguvi.ru/wix?keyword=sao+episode+19+war+of+underworld PDF link annotation
    • http://nigodofifulo.scienceontheweb.net/edit_text_app.pdfIn PDF document text
    • http://gonugotez.22web.org/minecraft_offline_version_free_for_pc.pdfIn PDF document text
    • http://tasefuvakol.22web.org/52311986069.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/how_do_you_sleep_with_a_broken_femur.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/57856148958.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://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_934078586065466aa64745af0da9c3ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/craftsman_chainsaw_20_inch_46cc_manual.pdfIn PDF document text
    • http://meluxowuxepos.rf.gd/33189769716.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/devevitufeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74906bd-703c-40b2-bcc1-55900ed3dd0e/friends_like_these_book_amazon.pdfIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_d5df8b1c635e4024940d3f96df5ab582.pdf?index=trueIn PDF document text
    • http://lorabedujeweb.epizy.com/medorosa.pdfIn PDF document text
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_becc6d5a0fd74d8c81a76dcfe838cb7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/34868844008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ff376c-0c7b-4992-9ef6-515e6e57042d/sidadovogaxibomitivinow.pdfIn PDF document text
    • http://lonuzokubezuva.epizy.com/83504729008.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/dotojidemug.pdfIn PDF document text
    • http://dunupilopun.epizy.com/marshall_mg100hdfx_half_stack.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/wetevolaburex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2b0f38-f27d-4504-9872-48f8583be15f/how_wide_is_a_canadian_football_field.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd182708-46de-4ac4-a119-f98ff7f5718a/what_type_of_oil_does_a_ryobi_generator_use.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2C4 44792 bytes
SHA-256: e0ec28bfb53d6c61c62849f71495898a63dea1d463b3ff8ee9cb81d6487eb254
font_01_sfnt_off00025bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25BC4 5240 bytes
SHA-256: 08655454e2b229980a0723a45e6a04a8d5991ff8f9b0232085cdccc05627afc1
font_02_sfnt_off00026d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D9F 11924 bytes
SHA-256: 3e88ffde602fc9615caac4728fb25bb29c2f4ee415eeb5330816f0e9d2a32e0b
font_03_sfnt_off000294c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x294C5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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