Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ff6dc1c207fc07…

MALICIOUS

PDF

88.7 KB Created: 2021-03-15 12:55:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 475eadde346f232c5c793057b02bda1b SHA-1: 10de545cf712bd45b396bedf58b232ee9d404ecb SHA-256: c8ff6dc1c207fc07b8067a83b9acdf57103f5447a84d790399314fdcba4ef700
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 0.9994

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://dafemum.ru/wix?keyword=birds+of+prey+2020+openload PDF link annotation
    • http://wejuveziwep.mypressonline.com/guia_de_medicina_ambulatorial_e_hospitalar_unifesp_hematologia.pdfIn PDF document text
    • http://gerododuxokamid.iblogger.org/83063054554.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/gggjjjc/soccer_goalkeeper_uniforms_for_sale.pdfIn PDF document text
    • http://bebodepana.22web.org/sqlite_datetime_type_android.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/XWSahja/international_calls_cost_three.pdfIn PDF document text
    • http://watomidipokaki.22web.org/dagijusi.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/bggjcjh/81763425411.pdfIn PDF document text
    • http://jafedaroz.iblogger.org/19556815333.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gowojurepola.epizy.com/viguxedudebobefulisaset.pdfIn PDF document text
    • http://mewugibi.rf.gd/61593276470.pdfIn PDF document text
    • http://xogegusubo.rf.gd/90073753137.pdfIn PDF document text
    • http://tofefovibef.rf.gd/vogenoxivadatad.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/22136685677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2379ff8e-c89a-4dce-bfe4-93d9903d94f9/what_is_a_good_mathematical_proof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b053602-bad1-49c4-a891-e92db0c65dfc/dapple_sausage_dog_puppy_for_sale.pdfIn PDF document text
    • http://gudelapomopovu.rf.gd/dududutadobanudokikorozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a21ff83-9d06-4742-9927-eaab88118450/is_magoosh_enough_for_gre.pdfIn PDF document text
    • http://valapapiwusujeg.rf.gd/battery_saver_for_iphone_4s_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4863b9c-3bfd-4ce4-a285-f3949177e45d/top_paw_double_door_crate_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f912b935-e88f-4339-bb81-fd4f6d8a863a/lemuwozijora.pdfIn PDF document text
    • http://semekumuxolat.rf.gd/slant_out_meaning_in_urdu.pdfIn PDF document text
    • http://xupaxemos.rf.gd/jutogagagaruxadowapaki.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001045d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045D 5460 bytes
SHA-256: 0e050a377ef85d4a724ac4ac32bb98eb4f4cf87cfea9160e27f2227b57b0e608
font_01_sfnt_off0001170a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170A 11996 bytes
SHA-256: ac990da16ba9e90c1108dea89285e0e6d598e36d6218b38cdf17a3b4074e58a9
font_02_sfnt_off00014045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14045 16064 bytes
SHA-256: 378ba5569bb666bbcf62f6b10ce7b1b17e3ec70dff13df96b0486da8cd924b4e

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