Malicious PDF — malware analysis report

Static analysis result for SHA-256 458e855084568026…

MALICIOUS

PDF

82.5 KB Created: 2021-03-26 09:56:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 72a33de6ee44d34bd8153c41df2776ee SHA-1: 53d4cf7746fb4c6d5bdb6491ee12c32386a1611b SHA-256: 458e8550845680268b5f8ddd5f9ef296e553a0c1a0dcf6387d6f396b4284f547
166 Risk Score

Malware Insights

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

The PDF contains multiple high-severity heuristics indicating suspicious and invisible links to external domains, including one that is explicitly flagged as a lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://dugedepap.ru/123?utm_term=meganthi+circus+movie+video+songs PDF link annotation
    • https://mitukuruzatag.weebly.com/uploads/1/3/5/3/135346955/58ffb984d53d00c.pdfIn PDF document text
    • http://pro-komp-master.website/44336829222fltqm.pdfIn PDF document text
    • http://managerprogram.live/papyrus_of_anitno8x.pdfIn PDF document text
    • http://zazeteku.iblogger.org/insurance_comparison_spreadsheet_template.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/3857822.pdfIn PDF document text
    • http://vixabaj.scienceontheweb.net/ginijavuto.pdfIn PDF document text
    • http://eurostore.info/jamixujavipukunulugusolp8ock.pdfIn PDF document text
    • http://gsmall.space/91869554079idoia.pdfIn PDF document text
    • http://merovew.xyz/what_kind_of_character_is_prosperoorusv.pdfIn PDF document text
    • http://kzrovk.xyz/343543671522u7i8.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/woluduzajapuraxunanuzi.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/bf26a09ff84.pdfIn PDF document text
    • http://redita.fun/dukuzuleretsj1.pdfIn PDF document text
    • http://differencecheats.net/xuwilusanil0brb.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/55058143466.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/what_is_the_etiquette_for_mother_of_the_groom_dress.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/wedosufufav-xipuxikuw.pdfIn PDF document text
    • https://gafirupi.weebly.com/uploads/1/3/1/3/131384721/wasuboge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guzedero.rf.gd/46921884266.pdfIn PDF document text
    • http://pipovafalalum.rf.gd/54549551514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9a541e-062e-42ca-880b-48c9addd1a45/the_real_elephant_man_disease.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f47f9e77-2f37-4299-9ee9-89843344f704/wu_tang_clan_american_saga_cast_members.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5140423-0121-46d3-9d81-dd78c250adba/the_witcher_season_2_release_date_reddit.pdfIn PDF document text
    • http://poxaxedezof.epizy.com/que_significado_tiene_el_arcoiris_en_la_biblia.pdfIn PDF document text
    • http://nabafutig.myartsonline.com/62186950394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83883de-ae42-4f22-8d9d-04b868961b32/37155105569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72ec07a9-984b-4280-9ec4-6599e37c221b/como_evangelizar_en_las_calles.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_off000105c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C5 5384 bytes
SHA-256: 759e5180ae354f1d082401da477eefc5ba47812ac00ab666dc3ca7573c52f103
font_01_sfnt_off00011800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11800 10756 bytes
SHA-256: fc84f64e93364f6ae53fde894fd2299311d7c9ea56a36b9ba456fd9827582c58