Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a7983df418a91c…

MALICIOUS

PDF

76.6 KB Created: 2021-04-30 15:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: adc25e141eb5e5647af146ba6d88f347 SHA-1: 5bccbc19e12bb159de04df83eea88e2cea6cfdbe SHA-256: a0a7983df418a91c5fd0ab72c60494569a5e07756d98bcce4c467df5f2c0a859
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=esperanza+renace+summary PDF link annotation
    • https://cdn.sqhk.co/nilesatu/5ia3032/ultimate_fishing_simulator_guide_sturgeon.pdfIn PDF document text
    • http://cloudmarket.website/are_tp_link_routers_any_goodjzlr3.pdfIn PDF document text
    • https://cdn.sqhk.co/bubuzibiv/gf8Cii0/fitbit_inspire_2_clip_heart_rate.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/Hzjfeja/flipper_clown_pinball_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/xesoralo/ocSTLfo/lindy_bop_dress_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/bawijodol/jzibhe2/wobemug.pdfIn PDF document text
    • http://itnegozio.info/shutter_island_movie_720p_dual_audiooj4sz.pdfIn PDF document text
    • https://cdn.sqhk.co/nenakowi/bAggvha/29283825009.pdfIn PDF document text
    • https://cdn.sqhk.co/meletadugox/jejhjdV/zinc_chromate_primer_data_sheet.pdfIn PDF document text
    • http://baugroup.info/resojagalonbq0eb.pdfIn PDF document text
    • https://cdn.sqhk.co/tisojubew/gcje0jb/management_accounting_dictionary_bba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buxazub.epizy.com/pixawekusib.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/american_bald_eagle_facts_and_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54167773-afbb-46a6-b65e-226d00eead1c/7629775395.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/31508217070.pdfIn PDF document text
    • http://xazabivi.epizy.com/ispad_guidelines_dka_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43369d1d-572c-4eb3-82a2-dbda3eb3b19b/what_are_the_layers_of_the_amazon_rainforest.pdfIn PDF document text
    • http://baduvebeketuwo.epizy.com/dixanofimenulivizilonedig.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_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 5156 bytes
SHA-256: ff06e748b801450e026afc4d98c4ccaa1d388146c58b0db8b2cbbb5bbeb352d8
font_01_sfnt_off000101d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 10332 bytes
SHA-256: 624a4960554902fe7040de539491848a2e45ab08266da9535be6f76471c2226f

Open this report in the interactive analyzer, or submit your own file for analysis.