Malicious PDF — malware analysis report

Static analysis result for SHA-256 34984996a33aecb2…

MALICIOUS

PDF

73.3 KB Created: 2021-05-07 22:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 399dc367d5ccf2b03eeccc274e526731 SHA-1: 6abc221ba5e9634727684e8c54953186ebf134b3 SHA-256: 34984996a33aecb2dea980077367f3fd33498b9ee31e174154e1307a74b28a49
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/strik?utm_term=eureka+multi+cyclonic+airspeed+one PDF link annotation
    • http://zesamoa.online/how_to_registration_in_pak_navyekhz7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_60181a8274d3d.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/cJcigJE/70898368561.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369506/normal_5fc67de5a3a33.pdfIn PDF document text
    • http://damewumesigalut.medianewsonline.com/sanarowiratelogojizowok.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/egfiaxH/9931130376.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/ugjIja1/nanemilemobubokuwoz.pdfIn PDF document text
    • https://cdn.sqhk.co/selugijibix/iibhfid/kexupifaba.pdfIn PDF document text
    • http://cocobeautybar.ca/medscape_anesthesiologist_compensation_report_2018nqkk5.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/33761423697n4hhb.pdfIn PDF document text
    • http://axecheat9.xyz/673231340338gj5q.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/how_much_is_a_ruud_gas_water_heater.pdfIn PDF document text
    • http://feelslike35.com/726471780886vzab.pdfIn PDF document text
    • http://piriveva.scienceontheweb.net/kipanorikemavoxuwom.pdfIn PDF document text
    • http://kewisanoxiv.66ghz.com/hillsborough_county_schools_report_card_schedule_2018.pdfIn PDF document text
    • http://lami-lashes.site/dakes_study_bible_free_downloadw31i8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461495/normal_5fceba0494ddf.pdfIn PDF document text
    • http://a1metromovers.com/jobogidebufogafunabatonuzjz.pdfIn PDF document text
    • http://temppicture.xyz/96848686376g97sp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_606a05d7aa862.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/84591479618.pdfIn PDF document text
    • http://kafujaguvo.mygamesonline.org/4868807395.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://libejojas.epizy.com/94476986788.pdfIn PDF document text
    • http://diwigivexuvobe.epizy.com/odia_song_2018_video_dj_mp4.pdfIn PDF document text
    • http://busezax.rf.gd/chrome_browser_for_windows_8.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_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 5344 bytes
SHA-256: e8126fea85226955e6c17e172bd86c8676297d552597f3b2d8a09c4cea4773dd
font_01_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 11404 bytes
SHA-256: 86de435678a4c3021f1a4b90b1267265ba74504674caf1a2fa146c2ac6b14086

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