Malicious PDF — malware analysis report

Static analysis result for SHA-256 76eac148ebdcbeac…

MALICIOUS

PDF

174.6 KB Created: 2021-05-20 23:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f8df52a9fbc0b44fb9125782b42d876c SHA-1: 5b552c20c63bf89125d6353479bef5c3738e4c54 SHA-256: 76eac148ebdcbeac1fc3f6d145692251a05c33b2fc216190b43180be79e66b63
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://soxebez.ru/strik?utm_term=briggs+and+stratton+500e+140cc+wont+start PDF link annotation
    • https://zoviwifave.weebly.com/uploads/1/3/6/0/136053666/pejij_memewop.pdfIn PDF document text
    • https://fijoxivivuf.weebly.com/uploads/1/3/4/0/134041864/mawixubobo.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/vekosilu.pdfIn PDF document text
    • https://bekedurid.weebly.com/uploads/1/3/0/8/130874189/eb9d25e81.pdfIn PDF document text
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/dipinilo_pafosux_vovoken.pdfIn PDF document text
    • https://nuduxojobiri.weebly.com/uploads/1/3/4/6/134629521/6852956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_604f2fa88c9d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391303/normal_5ff231087b3a9.pdfIn PDF document text
    • https://sanupeden.weebly.com/uploads/1/3/5/9/135961416/3355048.pdfIn PDF document text
    • https://memuvarava.weebly.com/uploads/1/3/1/3/131384606/8593924.pdfIn PDF document text
    • https://javetepamez.weebly.com/uploads/1/3/0/8/130814931/bavujovasifad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480584/normal_5ffe9efa56789.pdfIn PDF document text
    • https://wikazire.weebly.com/uploads/1/3/0/9/130968935/3035666.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/4728f1a0-4b80-401a-9672-9a5820a850c1/the_breadwinner_movie_vs_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b865e66-88d0-42c2-ba51-abd666131904/best_sat_reading_comprehension_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a990a75f-f650-49d4-9742-551ee3a09637/54702002545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4c1ad87-50bf-47a3-b5d0-cdf7c93fd21b/how_to_picture_search_on_google_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f804cbca-da47-4952-ac5b-5ce954f2e418/54078146740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c25a52-b08d-4d49-a863-f707700066b2/london_poem_by_william_blake_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1591f36a-a488-4df5-b8c9-928ab1792d39/nakitakupexovabuzaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7bb3b6-ddb0-48a9-8a4c-4b1d5d55e4a6/how_to_use_foodsaver_vacuum_sealer_v2244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff43d4a4-a106-4a03-8ec9-d9c8988b9412/15872148646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf441a2-47a5-4f15-96c7-0a6318039d86/wufosajelalijewabowoved.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c9ec6d-159e-49f9-9c34-016e1da7dc51/ps3_emulator_for_android_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc89dc2-ed94-4cc4-92a8-156a60a2f9bd/how_do_i_set_up_voicemail_on_nortel_networks_phone.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_off00026094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26094 5408 bytes
SHA-256: 98555e7534216738582295aceef7f9df0b30d52e3701c0973ca849bb15dfe684
font_01_sfnt_off0002731a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2731A 12552 bytes
SHA-256: 966dde8578d917d54c5624a9967ad33ca5a9335e3f70e9417b9af9a9340954cd
font_02_sfnt_off00029d4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29D4F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34