Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f11935f79e1ec3…

MALICIOUS

PDF

85.2 KB Created: 2021-02-27 22:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0864bd3cf1eea32e124105602e108fea SHA-1: e65c38c7956a7f0a22b6ed39ab888ae0ef61318b SHA-256: d8f11935f79e1ec3604a69f3bde951d44a3a8f2371bbed52765fed04ac304df1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate effort to create a large number of links on potentially untrusted domains, likely to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://resalured.ru/aws?utm_term=franklin+covey+speed+of+trust+summary PDF link annotation
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/juman.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/xozojonuxekonupidob.pdfIn PDF document text
    • http://sesapoleva.22web.org/paths_to_recovery_step_12_questions.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/dadovotafuroso.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/ZMWhdhc/boomerang_movie_behind_the_scenes.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/bitcoin_price_today.pdfIn PDF document text
    • https://xesufomoma.weebly.com/uploads/1/3/1/0/131070197/fb1ef392384d.pdfIn PDF document text
    • https://cdn.sqhk.co/pubabolab/7hj3Jtx/crazy_end_zone_dance_nsync.pdfIn PDF document text
    • http://dofapupore.22web.org/my_samsung_ice_maker_isnt_working.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/what_is_basic_probability_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/zjcQDaO/jilarerizuz.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/all_chastiefol_forms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gimobomir.epizy.com/55743485576.pdfIn PDF document text
    • http://pezomovororiz.rf.gd/59573343796.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/what_is_the_meaning_of_listen_verbal_abuse.pdfIn PDF document text
    • http://sewodup.rf.gd/zevogufixesegofuso.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/mickey_mouse_cartoon_german_flag.pdfIn PDF document text
    • http://feferabi.atwebpages.com/how_to_write_an_analysis_paragraph.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/fulubujidi.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/how_much_is_red_cross_cpr_certification.pdfIn PDF document text
    • http://tiwumuni.epizy.com/82188229634.pdfIn PDF document text
    • http://tujijekaxevon.rf.gd/2503763797.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 6548 bytes
SHA-256: b27c7a011d1e25a8740c16753f32df49003034e6b6973e84691b1598814ca5e7
font_01_sfnt_off00010de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE8 5484 bytes
SHA-256: 429f2a6763a7772e6965dc98a0728b6196ba79efb7778a63253fbb2c3587efad
font_02_sfnt_off00012091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12091 10904 bytes
SHA-256: 01ef9f4980d6a636b32c86819a20959172dd664d811f095ae10e082f36b05d93

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