Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e934f5784fc7db…

MALICIOUS

PDF

92.0 KB Created: 2021-03-12 15:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f9b0725452b5bb877e31aa32265eaea4 SHA-1: 6357fbe388d30905ad4cc40525c1147b6963d712 SHA-256: 48e934f5784fc7dbe7c7f2c47f2f9535d2ce02d6ff3e1d02a3df78ff8eab62c4
134 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it is a link farm hosted on disposable domains, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the PDF structure and embedded URLs point towards a social engineering attack designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/wix?keyword=bark+solution+manual PDF link annotation
    • http://microbladingeyebrowsdallastx.com/sense_and_sensibility_movie_2008kgfjf.pdfIn PDF document text
    • http://reweder.site/bersa_thunder_9_hc_pro_holster0uzzr.pdfIn PDF document text
    • http://livethailand.fun/weight_lifting_for_weight_loss_female_plansie09.pdfIn PDF document text
    • http://salonhq.xyz/covid_19_test_jobs_near_meda6tf.pdfIn PDF document text
    • http://nibitekafo.22web.org/whirlpool_top_load_washer_clean_drain_filter.pdfIn PDF document text
    • http://price-list.moscow/49246683889jwgnb.pdfIn PDF document text
    • http://italiabeach.space/how_many_years_to_study_marketing_managementrwmhy.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/bossy_verbs_worksheet.pdfIn PDF document text
    • http://masowetimori.iblogger.org/handwriting_practice_sheets_letter_d.pdfIn PDF document text
    • http://gagelepapu.22web.org/is_there_a_naval_base_in_charleston_south_carolina.pdfIn PDF document text
    • http://7gusevshop.website/age_of_sigmar_realms_of_battle_rulesh3f25.pdfIn PDF document text
    • https://daxosunusopudom.weebly.com/uploads/1/3/4/5/134510034/425693.pdfIn PDF document text
    • https://xoberaditide.weebly.com/uploads/1/3/4/6/134645794/jakenuxaso_lusukigutowumi_xerulagekovite.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ceec07-8b24-4365-b8dd-cd1555dbb322/root_word_families_definition.pdfIn PDF document text
    • http://mejumobax.atwebpages.com/anticoccidial_drugs_poultry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52b8b4ef-b0ed-4773-a130-f37439e6d1fc/george_bataille_story_of_the_eye_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c438c1b-fe20-4701-b4d8-7db3240b81af/79422327180.pdfIn PDF document text
    • http://kixukad.epizy.com/1156076276.pdfIn PDF document text
    • http://wazewatiduxuz.epizy.com/sap_abap_on_hana_tutorial_point.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_off00011abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABC 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off00012ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA3 4944 bytes
SHA-256: d6eebaf589a24be168d092bc7b6269dd49d56a748442afdb0ffa7cb56a029d7f
font_02_sfnt_off00013c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5F 11216 bytes
SHA-256: c3ebc0daad007a45de5064d3e0d01e71d45bfb4f50f22f83d7c8d591cd845448

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