Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cab33b2feb1e67f…

MALICIOUS

PDF

94.4 KB Created: 2021-05-20 10:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b84e640c4786c76f102a2903e9e94794 SHA-1: 0c95fcb3ce69c7bcbe9ee05fc8f9e003b4d9554d SHA-256: 2cab33b2feb1e67f8a0870b8e83f3b2e34d38af6ba907b0fc165392b8b8a70ab
214 Risk Score

Malware Insights

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

This PDF document was flagged by multiple critical heuristics as malicious, specifically for containing a large number of external links, many of which point to known redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the document's structure and embedded links suggest it is part of a phishing or spam campaign aimed at directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=toy+australian+shepherd+puppies+for+sale+in+san+antonio+texas In PDF document text
    • https://dowibowaxetejoz.weebly.com/uploads/1/3/0/7/130740522/jivimogelijulenem.pdfIn PDF document text
    • https://mepuralomelefaz.weebly.com/uploads/1/3/4/4/134494325/6f8997fb04b9468.pdfIn PDF document text
    • https://siraxaroxaran.weebly.com/uploads/1/3/1/4/131483069/5fb2b.pdfIn PDF document text
    • https://tufizesux.weebly.com/uploads/1/3/4/5/134596030/1263332.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/01bc37cd-4481-4ede-8b51-0963bd331eda/tesosad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e429619d-96f1-4c4a-a1a5-3bbc6f445084/diary_wimpy_kid_book_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1371c487-2d96-4a8c-854f-860a614bbcc6/wedawawoziwaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1461e210-93c2-4e6e-b5bd-8b3029e4a006/is_malm_bed_sturdy.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/las_flores_del_mal_poemas_comentados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc7618e-e675-4e21-899a-a582320f920b/frankenstein_shelley_themes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdd03573-e77e-4c03-b863-feb5895715c5/what_is_the_point_of_cloud_atlas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcfddf93-6175-4e94-b739-a091b51ce991/digedug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b907c34a-e0f5-49e3-b9a3-f9a3e63b3411/craftsman_18_chainsaw_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/86209939441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8376cc5b-d630-44d6-9f28-bf273053337b/stephen_king_book_cover_blanket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0a789e-9037-40b6-9273-dff409cc725b/why_wont_my_dyson_ball_stand_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1bf904-9651-478f-9192-827cc77fcad5/14751812489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6b180e5-39be-4775-872e-e38ec5d8dd6d/sharepoint_designer_2013_approval_workflow_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b2ec329-f6be-4a59-8272-a8d59c77959d/how_to_write_amazon_product_reviews_for_affiliate_websites.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/amman_hd_images_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccd06eec-bc26-42a4-9725-4b2054d017e8/schwinn_exercise_bike_seattle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23aa0027-af71-442a-b8fe-ee97fb233270/in_christ_alone_lyrics_owl_city.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/sibitibodawap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c15e651f-8313-4dbe-8761-b4312df42d57/xilurejalakededupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f9ce05-21f6-4b74-9bf3-999000111f3c/heat__glo_northstar_wood_fireplace_parts.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_off00012d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D12 5248 bytes
SHA-256: 359ed7625607910147462ec3a2c08d0a0647487b851b2bd80272b49bc382188e
font_01_sfnt_off00013ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF4 13196 bytes
SHA-256: 3428e034cd343d4314ed0f3d570d0ff5a4e9c3ab933d02f3b61a22418cd1bd5c

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