Malicious PDF — malware analysis report

Static analysis result for SHA-256 a824fdcbcc0f8f3e…

MALICIOUS

PDF

68.6 KB Created: 2021-03-04 15:25:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 56539eba83fecbdd328e85cfdbbb04c6 SHA-1: 8e99b0c3dac001a044e6fe98c268f67b570e9556 SHA-256: a824fdcbcc0f8f3ebe897338b04353057ccdee0816d63ddf88e3fa75e8d80a19
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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/award?keyword=drinkwell+platinum+pet+fountain+filters In PDF document text
    • http://gakawisogafuga.mygamesonline.org/tibefilewaza.pdfIn PDF document text
    • https://kefavobora.weebly.com/uploads/1/3/6/0/136010588/zakozemutupuked-rolasig-gegugedipiwaje.pdfIn PDF document text
    • https://zogopovedizojux.weebly.com/uploads/1/3/1/4/131408172/folegizofabu_nanidawal_rakajabunorof.pdfIn PDF document text
    • http://finonit.mypressonline.com/bose_mini_speaker_connected_but_no_sound.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_6009b2326c86d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410447/normal_5ffaac485e0b5.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/dodutinamufagojokixorujid.pdfIn PDF document text
    • http://digitalcalakk1.xyz/66841996554rbinl.pdfIn PDF document text
    • https://xunusavijogomos.weebly.com/uploads/1/3/4/7/134702941/dutekata.pdfIn PDF document text
    • http://nigasheff.xyz/larry_david_net_worth_20189z66b.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/cd42277e-ed34-43a7-9ba2-62dadf661e96/schwinn_570u_upright_bike_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/59943073904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6303c4-f815-453b-a092-937c47ae92f9/insinkerator_garbage_disposal_with_cord_badger_5xp_3_4_hp_continuous_feed.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/ciclo_de_krebs_paso_a_paso_facil.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/89825708243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40bd7a98-c0ea-4c2d-b40d-645b078087b8/vizio_e601i-a3e_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d09b9d9-694a-4af7-b479-d3e8b026569d/what_is_child_focused_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/pupisuj.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/75315000480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1191cd-3d5d-4b22-b28e-1b660d06c562/canon_av-1_manual_book.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_off0000cdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF5 5200 bytes
SHA-256: 2f87058d8501620916ff2365c0c0fd0c66e8e7140fe626ba57b855bf1071f35b
font_01_sfnt_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 10536 bytes
SHA-256: 714bd5e8d1327cd08df0eed7aa0772e399b107233443ac2662a04a53e30980a5

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