Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c97b7ecbe94d8d…

MALICIOUS

PDF

94.0 KB Created: 2021-03-18 04:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1cdcffd11cf3dc6d3654b9509a8ff09d SHA-1: 99be0543196905f0aa2f4d6c7d049161488d2573 SHA-256: 17c97b7ecbe94d8d820030025b7998d620a524fbe312c485c26db16ccd08d849
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to search terms, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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.
  • 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/award?keyword=anthem+ayn+rand+pdf+espa%25C3%25B1ol PDF link annotation
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/morefe-fapatugizeti-numogo.pdfIn PDF document text
    • http://peteferix.mypressonline.com/how_many_decibels_is_a_dishwasher.pdfIn PDF document text
    • https://xewikoleruwi.weebly.com/uploads/1/3/4/8/134897031/8230165.pdfIn PDF document text
    • http://kolekewoni.mywebcommunity.org/how_to_put_currency_exchange_in_excel.pdfIn PDF document text
    • http://wowogobofomufu.mygamesonline.org/bopidamofixiromogakipetel.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/best_drinks_to_mix_with_crown_royal_apple.pdfIn PDF document text
    • https://cdn.sqhk.co/zisazege/hbpz3je/printable_word_document_meeting_minutes_template.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/f0d86b.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/22989840460.pdfIn PDF document text
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/cd1753f5f3.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/5jinShj/97712498115.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/mubuxemapejezaxita.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://xijewixevav.onlinewebshop.net/52708215157.pdfIn PDF document text
    • http://lejiletuvasipib.onlinewebshop.net/90671357604.pdfIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_851b6f01041c470d92fcd4273898e2dc.pdf?index=trueIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_b378651d8cda469da89752b6363e4fb1.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_e8c4ea5b1ed947429f2fe7081ea05933.pdf?index=trueIn PDF document text
    • http://zipemoluligera.myartsonline.com/candy_candy_final_story_download.pdfIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_479f698f951748afbdd0eecc7ff5e819.pdf?index=trueIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_f9c877e6094c4b4cacbd020bb242a8f0.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10408 5584 bytes
SHA-256: d82fb6d9b3e3152044b62aa3e50a82a2d5c605359a6e8a8e544d5477db50d357
font_01_sfnt_off000116a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A0 3204 bytes
SHA-256: a0f5a8dfeaa0bb6dc0effbaf73f2996d6fa971a09dbb121d521afc971fdcd47e
font_02_sfnt_off00012393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12393 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_03_sfnt_off00012c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C21 11204 bytes
SHA-256: 92c91ae0dfbeb7166f06417993ca649850dc31ba3adb3913735ec1106af45e6c
font_04_sfnt_off00015281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15281 16068 bytes
SHA-256: 5338b60dac2ddcc9fbf81734882903060897ff8c18563aad6864a581beec55c6

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