Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f4c2f674ded95e…

MALICIOUS

PDF

73.5 KB Created: 2021-03-20 07:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 38f0ee6444c04c15fef4b9ea1c9b9cdc SHA-1: 58a07b5bb129b01886fe222b3c4f5b742542eb72 SHA-256: 72f4c2f674ded95eb4bc587f05ec6dc63edcc26e8b6453055ce305297ac108e1
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'golowaki.ru'. The document's structure and embedded links suggest it functions as a link farm, directing users to potentially harmful content. No scripts were extracted, but the PDF's nature as a link farm is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://golowaki.ru/award?keyword=movie+made+america+pdf PDF link annotation
    • http://hushseo.online/why_does_my_dell_monitor_say_no_hdmi_signaltn6j2.pdfIn PDF document text
    • http://testvvd.xyz/4_types_of_sentences_quiz1c96g.pdfIn PDF document text
    • http://update-win20.online/mepadagexowutorvk2y.pdfIn PDF document text
    • http://minuette.me/dudorevirilibakulaturuxakprm9t.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/25473741142.pdfIn PDF document text
    • http://mavpa.fun/13450303099hqjmq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/036395bb-5d18-4fc1-ac52-aaa19f8505a7/zombie_age_3_mod_apk_free_shopping.pdfIn PDF document text
    • http://xadifoduboboriv.rf.gd/56511840972.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/how_to_check_commercial_vehicle_insurance.pdfIn PDF document text
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_1b9eceff174d41f7859eafbbf40c1b8a.pdf?index=trueIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_8f862eb5a05c496cb64ee59f202d9785.pdf?index=trueIn PDF document text
    • http://zilowovuv.atwebpages.com/1970_ford_mustang_mach_1_428_cobra_jet_production_numbers.pdfIn PDF document text
    • http://femodizabofowu.epizy.com/58253984787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a234e6c-67fc-4496-a3fb-bd8f619cd154/fataliporewabimugaxas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a70dd277-6454-42d8-bdb7-e905ad56845c/the_flower_of_life_spirit_science_6.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/42689251219.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_8452f885985f4224a7dec995c9961d18.pdf?index=trueIn PDF document text
    • https://4a31e3f8-49e3-4331-b1a9-c0bb7a6b9dbc.filesusr.com/ugd/599f1c_58a86cd1f8064ae68bef2b46325137d7.pdf?index=trueIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_b64e3168e7e34c7ea4c905956befde2e.pdf?index=trueIn PDF document text
    • http://lipeporo.onlinewebshop.net/automate_programmable_industriel_dunod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c1a31f-6077-4406-af93-5c0c19e4daef/char_broil_9000_series_grill_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/sony_str-dn1040_bluetooth_pairing.pdfIn PDF document text
    • http://dejomogilum.rf.gd/21662849484.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000108ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x108AD 17472 bytes
SHA-256: 866daad76da4272435414f1736e7b7490aa263b16e96aa62f138a1099c08fe44
font_00_sfnt_off0000d549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD549 5156 bytes
SHA-256: 3bd9d19dcd1cfbfb6dd38b3559f0855799a6c6f9cc8e28f01ca06cd512945155
font_01_sfnt_off0000e6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D0 9848 bytes
SHA-256: c1ab318adb333a582400d2376248b5a721b86a8f9508f56a5e16ab5f1bf36236

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