Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa998060c2d4f1c2…

MALICIOUS

PDF

80.3 KB Created: 2021-03-14 21:14:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ee973962779c3dc003d35c1b1b761c0 SHA-1: 9e3f49eb7b152c6d3acbb3968c9d8ad8b7b9d752 SHA-256: fa998060c2d4f1c2b053c6ba3d5ce2cc8ad786244dde84b879a479c78651f4e1
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The document body, though heavily obfuscated, contains keywords related to propaganda and emotional words, suggesting a deceptive lure. The presence of multiple unknown reputation URLs, including one directly linked to a potential SEO keyword, indicates a strong likelihood of malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://midufefew.ru/wix?keyword=emotional+words+propaganda+pictures
    • https://lewumirobubav.weebly.com/uploads/1/3/4/7/134762292/sitin-xusexasula.pdf
    • https://fozaxebefi.weebly.com/uploads/1/3/4/5/134584315/tumogotodewab.pdf
    • https://migigagabigugam.weebly.com/uploads/1/3/0/7/130775968/7024434.pdf
    • https://cdn.sqhk.co/vakanaju/Hhjjd2U/forgotten_land_literature.pdf
    • https://zizojatemizowen.weebly.com/uploads/1/3/4/0/134016780/wipebi-tekorid-kerafu.pdf
    • https://cdn.sqhk.co/bexefoboxevi/gjfgcjb/anime_studio_story_masterpiece_combinations.pdf
    • https://bojibelatos.weebly.com/uploads/1/3/4/0/134040608/6640282.pdf
    • https://nukawopuriw.weebly.com/uploads/1/3/4/3/134347541/1222848.pdf
    • https://rikizanasurixa.weebly.com/uploads/1/3/1/3/131379420/6ee9e4067.pdf
    • https://fiwigerisen.weebly.com/uploads/1/3/1/4/131408459/kotowuvokon.pdf
    • https://cdn.sqhk.co/gafokoru/3jby7hb/samsung_health_heart_rate_note_10.pdf
    • https://cdn.sqhk.co/zokelotosa/ggdgehf/74288067407.pdf
    • http://want-seo.ru/98449549797xvt37.pdf
    • http://sfhgfje5df.xyz/787416167658omsh.pdf
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/f1aba19aa85.pdf
    • https://zajavaka.weebly.com/uploads/1/3/5/3/135322154/senerazukogo_posamamu.pdf
    • http://bnl-jobs.com/maytag_quiet_series_300_start_button_not_working37uno.pdf
    • https://palujaburufo.weebly.com/uploads/1/3/2/7/132740236/gelefi.pdf
    • https://roxoxurapu.weebly.com/uploads/1/3/4/3/134307884/jojivo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d5a3f769-0479-48be-85a7-fde4098231ca/41027071086.pdf
    • https://uploads.strikinglycdn.com/files/90326df4-69c5-4fe6-a475-d5d62f5b8c67/casio_5081_battery_replacement.pdf
    • https://uploads.strikinglycdn.com/files/4be1443f-06a2-4dfd-a379-a27941b3d2b4/55960000351.pdf
    • https://uploads.strikinglycdn.com/files/0d408a93-81da-4d8b-8c7d-54221b48839b/dp26640_sanyo_tv_specs.pdf
    • https://uploads.strikinglycdn.com/files/72f2fca2-d1bb-48ba-ab4d-ad9cb36bd593/calcular_volumen_de_prismas_y_piramides.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc27.bin
1da65d2fabf6a4b3fcf498f708f824b8d8da0cccfd9fa0e1c0d7a88378af38b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 5444 bytes
font_01_sfnt_off00010ea4.bin
050ce951832a9010cb1b31a9f44708b5e15c5dcaedda9c0eb29485b692a64525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 10828 bytes

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