Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffac5895ab1121fd…

MALICIOUS

PDF

87.5 KB Created: 2021-03-16 11:29:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cd81bf33c9d7c63992faa6fa2fe51fcc SHA-1: b221a0f9107c7fa7fccf6c07145f8e5f184df01b SHA-256: ffac5895ab1121fdd0e8082a3a8c385de8b7c7537d00e9539f2babf94c685728
146 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam pattern, where the user is prompted to call a number. The embedded URL `https://xezojetit.ru/wix?keyword=hydro+flask+warranty+tracking` likely serves as part of this lure or a redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/wix?keyword=hydro+flask+warranty+tracking PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488116/normal_5fc9eedb626d2.pdfIn PDF document text
    • http://igbusinessabouthelp.com/texagofugijajudesarubopujjsih.pdfIn PDF document text
    • http://prod-fruit.space/21061723655zi5j0.pdfIn PDF document text
    • http://instasurprise.online/canon_canonet_ql17_batteryslmbg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412761/normal_5fe5c221a04f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371244/normal_6008ece2c11ab.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/les_miserables_musical_streaming_free.pdfIn PDF document text
    • http://maykistore.ru/tagixavijexiwoboxififobakxg3k.pdfIn PDF document text
    • http://gdztut.com/360899231660b5q9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459466/normal_6014f91bad871.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://voturugivorajop.onlinewebshop.net/jusepixakezoja.pdfIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_cfbd002a9acc4cfeb7bde3941b674f33.pdf?index=trueIn PDF document text
    • http://fidalanono.myartsonline.com/85511048334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49803fde-6370-4d6e-bcb3-601cac0ed317/what_reading_level_is_junie_b_jones_dumb_bunny.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_8a0599f43ed841ee9ccc54da1b8df661.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec197dc-a7f0-4d4c-8014-870c5d87ec1b/is_it_worth_fixing_a_refrigerator_compressor.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/kindergarten_worksheets_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53575c5e-963f-446d-8811-bd9dafda2729/jazisobujoperug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/519a7ece-f85e-4c20-9cc3-b2bf1a900a37/how_to_program_garage_door_opener_keypad_liftmaster.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_off000113d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D2 5408 bytes
SHA-256: 340f5631b9cfbf19143076676eaa4bd56cf46372b28a7555e9f3051e918b09eb
font_01_sfnt_off00012664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12664 11960 bytes
SHA-256: d9ffc5e5b575ec2bbafeb492c4fb3167a2bf665b025600a343fd0e00c626b782