Malicious PDF — malware analysis report

Static analysis result for SHA-256 f678bc10320c5dba…

MALICIOUS

PDF

73.3 KB Created: 2021-03-22 04:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0c6a08bb6f38eed689e2031f3cf51388 SHA-1: d54af88658cebd34f03ccac96abceedd47d63417 SHA-256: f678bc10320c5dba2d225edc369d943b69fa4a0ae278f6f59f826b684d0afc4b
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm and for suspicious invisible links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=graco+modes+jogging+stroller+manual PDF link annotation
    • http://4gusevshop.space/arboretum_board_game_rulesb17s4.pdfIn PDF document text
    • http://masajsalonunuz.com/varewewefasu1sz3x.pdfIn PDF document text
    • http://donbetosstreettacos.com/67733342334unhky.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/idiiGjc/formao_do_aquifero_guarani_resumo.pdfIn PDF document text
    • https://cdn.sqhk.co/zirevazul/dWNFaBb/traffic_golden_gate_bridge_north.pdfIn PDF document text
    • http://fionainthefield.org/6036113077wvryw.pdfIn PDF document text
    • http://lnstagram-support.live/5942990231ywebv.pdfIn PDF document text
    • http://fegebekuxew.22web.org/britannic_movie_free.pdfIn PDF document text
    • http://useplafond.xyz/9879114522709cr4.pdfIn PDF document text
    • http://mebelrostov.ru/zijewiviredodebelavidom7764v.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/family_violence_and_child_information_sharing_scheme.pdfIn PDF document text
    • http://ryduslim.website/samsung_galaxy_s9_android_10_q5pw20.pdfIn PDF document text
    • http://limecash.xyz/refabamexurezijew6fyxl.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/hifWmif/sawixemebur.pdfIn PDF document text
    • http://sberbank.services/piggy_book_2_release_date_timen7sj3.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://uploads.strikinglycdn.com/files/da74e690-7aa9-434f-aa58-340e8482465d/imovie_11_user_guide.pdfIn PDF document text
    • http://vivimaga.epizy.com/adblock_plus_root_apk.pdfIn PDF document text
    • http://jesebikalag.epizy.com/rimabisemerusibuzetigim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14858ca-97e8-4cb3-8f9d-83c926e03791/roald_dahl_the_witches_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0092da9a-d93d-4295-a393-3051f14d7498/can_i_track_registered_post_international.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911b9c3d-5d8f-49f3-b87b-519b7569767a/basunudesok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5271d7c5-2a4c-4747-9d8e-fdac427f7229/how_to_train_your_dragon_book_series_12.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E7 5248 bytes
SHA-256: dd4549bf6056522632128584d00a7adf7175df3d054969095fee39b0768ed5ac
font_01_sfnt_off0000e6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AA 11104 bytes
SHA-256: 4bce1c35be688fcebb3f07179e4adbe5f5c47e519488f215fa53522d9a5fedb5
font_02_sfnt_off000109c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f