Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9944dec12bd1e5…

MALICIOUS

PDF

76.9 KB Created: 2021-03-11 13:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 390a24f18928b137fde16884cbae1756 SHA-1: 98175782542e7471d395aa55be0d8dc89beabcba SHA-256: 9b9944dec12bd1e5b23631988a220bfeee2e160bc9582b7687ea6b2f964a80a0
186 Risk Score

Malware Insights

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

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 0.9952

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 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://jottigo.ru/aws?utm_term=what+plants+are+edible+in+the+uk PDF link annotation
    • http://dewiluvafaridi.22web.org/88215412414.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/ahghfid/livanilofovuvolis.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/z2jfuii/vuwexufotuxaxibup.pdfIn PDF document text
    • https://bukowomuwuritif.weebly.com/uploads/1/3/4/4/134443612/wuzofujabix_ziviwunaten.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/ggfRgjk/omron_blood_pressure_cuff_walmart.pdfIn PDF document text
    • https://muputobiga.weebly.com/uploads/1/3/5/3/135308906/nijavowuvusepilawa.pdfIn PDF document text
    • https://lerelapukuvi.weebly.com/uploads/1/3/0/7/130740054/3358272.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/ranosavabixiwof.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/ihhShfw/xolixixizalotutofukujaza.pdfIn PDF document text
    • https://jaxuvoxet.weebly.com/uploads/1/3/5/9/135979876/9129366.pdfIn PDF document text
    • https://cdn.sqhk.co/wusoxopejezo/jbhdjfj/73429280799.pdfIn PDF document text
    • https://tabejasutunuvi.weebly.com/uploads/1/3/4/2/134234833/gikibime_dulamemubuvul.pdfIn PDF document text
    • https://najonetawo.weebly.com/uploads/1/3/4/5/134522785/nopepasopodifelo.pdfIn PDF document text
    • https://diloxutal.weebly.com/uploads/1/3/4/5/134598378/vijulir_kawezusara_jinovobot.pdfIn PDF document text
    • http://tuwavetatifida.iblogger.org/355236603.pdfIn PDF document text
    • http://xutarima.22web.org/how_do_you_describe_tone_of_voice.pdfIn PDF document text
    • https://raxokada.weebly.com/uploads/1/3/1/4/131409035/ac6c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_9120032e3685497fa92c682209f51bfc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/35fe335b-5130-4305-9cd5-b90433deea7e/divergent_full_movie_online_free_dailymotion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c981e7f-d831-48cd-98b3-a4b81d337a99/gopro_hero_4_silver_manual_svenska.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_a636b689439c48fbbe16dfc03362a574.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b648c6a-4d8d-4ac7-9adf-089c5763a111/hp_deskjet_6540_driver_download.pdfIn PDF document text
    • http://larisakexifa.epizy.com/19160762296.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_8b322b7bfecf4c30b5a8c7cd07553a50.pdf?index=trueIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_2cae079b8e08434db52ef764fd3c013b.pdf?index=trueIn PDF document text
    • http://pugetuwozijeso.rf.gd/36259221147.pdfIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_49559b4683ed4df09f64fa504791e58a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 5264 bytes
SHA-256: 0bb6cedfa15a35d6d1b293c585db6b81e20f2211e1cb53f6635fa48bb5aa8ecc
font_01_sfnt_off0001005f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 10816 bytes
SHA-256: 1bd81c89047a128b100eeb2c1534ebcbae6cbba11086943b0e19ee7cd092d816