Malicious PDF — malware analysis report

Static analysis result for SHA-256 2baabb30f41cd12b…

MALICIOUS

PDF

77.0 KB Created: 2021-04-03 06:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81b6eea30070436c8d0549201656308c SHA-1: ebf6f3d40750528fe116f72703db108cc0d84ae4 SHA-256: 2baabb30f41cd12bd011fa8e45a34f62512f1a8db64c20b69ea814237ea3cd3e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. The embedded URLs are used to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/wix?keyword=ocean+currents+worksheet+middle+school+pdf
    • https://kukatuvitakutir.weebly.com/uploads/1/3/4/6/134690336/koforuvaz-xabunebi.pdf
    • https://xixonulavef.weebly.com/uploads/1/3/2/6/132683080/7717056.pdf
    • https://xexalidifiso.weebly.com/uploads/1/3/4/6/134685587/8506344.pdf
    • http://italia-doc.space/what_does_it_mean_when_the_full_moon_is_in_cancerk9vs2.pdf
    • https://naratejog.weebly.com/uploads/1/3/2/6/132682615/wogisimerabejam.pdf
    • https://lezogifivejuz.weebly.com/uploads/1/3/2/6/132682585/6018371.pdf
    • https://vidajubobulixi.weebly.com/uploads/1/3/4/6/134650234/mozil_vusebizon.pdf
    • http://lnstagram-verificationbadgeform.com/68242862342vd2qc.pdf
    • http://wamikesaximilub.22web.org/vote_for_me_poster_templates_free.pdf
    • https://vobilazi.weebly.com/uploads/1/3/5/3/135300702/jonitevajozegav-zezanex-tivapa.pdf
    • https://sinipipa.weebly.com/uploads/1/3/0/8/130874509/nexil.pdf
    • https://lolekujawifom.weebly.com/uploads/1/3/1/0/131070351/34bd677938ba6cf.pdf
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/f608e00d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://pavitekoruw.rf.gd/fajijutilegupu.pdf
    • https://s3.amazonaws.com/wefadep/wenibomuwafigudov.pdf
    • https://s3.amazonaws.com/wujapu/eau_guidelines_muscle_invasive_bladder_cancer_2017.pdf
    • http://kosuvoz.epizy.com/bridal_shower_invitation_template_psd.pdf
    • https://s3.amazonaws.com/najubu/structures_why_things_dont_fall_down_epub.pdf
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_7b5f7d8ba0bb45efafbc071ce74ab665.pdf?index=true
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_bc1161c1ea9c48a0803bb963023eeee2.pdf?index=true
    • https://s3.amazonaws.com/jebupofedijakuk/jodav.pdf
    • http://xinudigiwuwa.epizy.com/rpvv_class_11th_admission_form_2018.pdf
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_d3622e8fc5b94406a5e7642768c53d52.pdf?index=true
    • http://tininababa.rf.gd/troy_bilt_weed_eater_not_working.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ac.bin
cd727408e1b71cbe18e77fb1cb662ea3369521079cb17a2585185e21228ac84a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 5460 bytes
font_01_sfnt_off0000f41d.bin
ef1685fe61f39c02be2eac3ffbcf4e0b4aa20b1be665e34e9350bed693ede099		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41D 10692 bytes
font_02_sfnt_off0001182e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 4324 bytes

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