Malicious PDF — malware analysis report

Static analysis result for SHA-256 33badeaa4de00129…

MALICIOUS

PDF

79.6 KB Created: 2021-03-08 09:06:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 655581f4b4b65836f7c96ca2fe086c64 SHA-1: 50c53d1e0549a6b1f4381dae8cfd2b258c19110b SHA-256: 33badeaa4de001296aa11af19ff3c35cccac08c3c4f46de929ac7eb171a5a92c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ClamAV as a phishing trojan. The embedded URL 'https://lozipotod.ru/strik?utm_term=researching+corporate+social+responsibility+communication+themes+opportunities+and+challenges' suggests a lure related to corporate social responsibility research. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=researching+corporate+social+responsibility+communication+themes+opportunities+and+challenges PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494866/normal_603063dba6d96.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedimuwo/v6qgjjb/xbox_series_x_release_date_uk_stock.pdfIn PDF document text
    • https://cdn.sqhk.co/wogirujut/hdJsibl/family_hotel_renovation_love_story_match-_3_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_60252a69c271e.pdfIn PDF document text
    • https://relazubaw.weebly.com/uploads/1/3/5/3/135315829/7100297.pdfIn PDF document text
    • https://xelopapet.weebly.com/uploads/1/3/0/7/130775154/3418645.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/iihegjr/12075423671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_600f4a5c724f1.pdfIn PDF document text
    • https://gifezimudafero.weebly.com/uploads/1/3/4/3/134312010/4748327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_5fd665b362df3.pdfIn PDF document text
    • http://rkconstructionsucks.com/closely_held_trust_reportingv5edb.pdfIn PDF document text
    • https://wevikafajaxa.weebly.com/uploads/1/3/1/1/131164556/tipixemovalo_gawinob_lumusefisigikan_lefisipadapu.pdfIn PDF document text
    • http://cyberghost.store/94334392036of8up.pdfIn PDF document text
    • http://udilische.club/programa_unir_varios_gratists4mm.pdfIn PDF document text
    • https://vifazadaza.weebly.com/uploads/1/3/4/8/134883600/roduwaj-popafujukudab-mizekole.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/31b519ad.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/8ec8e471-625a-45d7-984a-a2bc4323863a/how_to_find_out_your_hcg_levels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35cd2920-37ae-4682-90dd-114f0d841f8a/nimuvamikobalijaxon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c4b286-3866-4f95-937a-aa5199dd1d1f/reloj_casio_illuminator_telememo_30_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1b9c4c9-c0ed-4eab-b24b-63a7a216adf9/how_to_connect_polk_audio_subwoofer_to_receiver.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_off0000e94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94D 5616 bytes
SHA-256: b88053e8b7abf723da4b00a53a95e95804917bc2ebc0ad82bf0633feeab4af0c
font_01_sfnt_off0000fc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC30 10916 bytes
SHA-256: 38a29601c62b72c550fbac495fff12905cdbb9efba959678d086f2b76fed584b
font_02_sfnt_off00012174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12174 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c