Malicious PDF — malware analysis report

Static analysis result for SHA-256 012a109a418a5f5c…

MALICIOUS

PDF

82.7 KB Created: 2021-03-04 12:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: cd74f9f2761c465168a37e8e5b71a3f6 SHA-1: 0b99e6a20f0e401441d45fc4c4cf5f4a13c4c526 SHA-256: 012a109a418a5f5c01cbe25299709b437b06c345ddb41165fb750332a392991d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score further support its malicious nature. The document body, though heavily obfuscated, contains keywords related to downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://nipisod.ru/wix?keyword=sd+maid+pro+apk+latest+version+download PDF link annotation
    • http://jojazinex.mygamesonline.org/pacific_hydrostar_1650_psi_pressure_washer_hose.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/zukefewepizijobidetatikon.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/who_voted_against_obamacare.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/tebulikagelapukov.pdfIn PDF document text
    • https://renixopofofof.weebly.com/uploads/1/3/4/4/134486295/kufikul.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/what_is_definition_of_full_service_public_relations_consultancy.pdfIn PDF document text
    • https://duxudalo.weebly.com/uploads/1/3/4/8/134866109/3942d8d3a6c8c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_6038c390e30a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405184/normal_5fe27f12af809.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/kegekopajovarosinid.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/how_to_drain_ruud_hot_water_heater.pdfIn PDF document text
    • https://fufiwixafuwisu.weebly.com/uploads/1/3/4/7/134770326/f83affd03692d2a.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/debabefivu.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/honda_power_washer_pump_oil.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/song_of_ice_and_fire_wiki_robert_baratheon.pdfIn PDF document text
    • https://demozopadusil.weebly.com/uploads/1/3/2/8/132816094/35a369933.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/roduxovalezek.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/sccm_mp_hinv.log_location.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65D 5424 bytes
SHA-256: 96ced7f84f1183980cc5f72b0b8f06a7eb62963e720a27f797f65fa65db0006a
font_01_sfnt_off0000f8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 2236 bytes
SHA-256: 6b2d3c5f6256688f626d058edaec36c164b6f3560f9078c09021343a121ddc15
font_02_sfnt_off000102ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EF 10828 bytes
SHA-256: eebfff68aabffcfbcaa506a0aaa4512d9af871430092c911eda054bfd7c51aa9
font_03_sfnt_off0001268f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268F 16672 bytes
SHA-256: a26a6f6f3df2c07d1e971bcaff94607f73a47ac852c1530dfcb1043d1b740844

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