Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ad264f1cfbf413…

MALICIOUS

PDF

73.1 KB Created: 2021-05-13 14:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9f7e050618918e2c873225b95f61839f SHA-1: 58673fe6548fc8a0d6e8381314ccd571aeebd29e SHA-256: 17ad264f1cfbf413e2849d3694c64a8a36d14c7c7bd228c501d5c002cf14ab0e
184 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, many of which point to disposable hosting or known malicious redirectors, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to carplay setup, likely a lure to entice clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+do+i+set+up+carplay+on+uconnect In PDF document text
    • https://rekifunesivi.weebly.com/uploads/1/3/4/4/134404589/gagum_gadesujax_momemali.pdfIn PDF document text
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/f1ea78e9f.pdfIn PDF document text
    • http://websecurer.tech/how_much_is_my_antique_radio_worth1hdqr.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/zaxonaxutufoke.pdfIn PDF document text
    • http://knitfqph.site/bukererabuwioewk5.pdfIn PDF document text
    • https://zaroralovez.weebly.com/uploads/1/3/0/8/130814195/mukilojukoxivumimal.pdfIn PDF document text
    • http://mexicotop3.xyz/nevinaturi05imi.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/625213c7-a8a3-40dc-92a1-fc6cfa76cb84/timex_wr50m_turn_off_alarm.pdfIn PDF document text
    • http://wunenubomoge.epizy.com/body_combat_80_choreography_notes.pdfIn PDF document text
    • http://togotavasokuzez.epizy.com/bible_activity_book.pdfIn PDF document text
    • http://vodulaxezapudez.epizy.com/xurefepazeludup.pdfIn PDF document text
    • http://satekivu.rf.gd/free_classical_guitar_sheet_music.pdfIn PDF document text
    • http://sivopob.epizy.com/9153101646.pdfIn PDF document text
    • http://kunizifafam.epizy.com/62695536484.pdfIn PDF document text
    • http://gapibixofezutef.epizy.com/kapumurax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833975f7-bd7f-409e-bf18-1f1d01d7b1ab/formula_quimica_acido_cloridrico.pdfIn PDF document text
    • http://pasexojubil.epizy.com/kalezexerajariba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6b0202-049f-4948-a2c2-400e3b85561f/25904251266.pdfIn PDF document text
    • http://zakuvusebaj.epizy.com/53226740088.pdfIn PDF document text
    • http://pavuwovoj.rf.gd/what_of_this_goldfish_would_you_wish_analyzing_the_text_questions.pdfIn PDF document text
    • http://bidavavaxekize.epizy.com/manual_de_autocad_2020_gratis.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE214 5220 bytes
SHA-256: 952a21b1a15ba040e0b9fb310cc34968c35aa46d253b18761c2be0da48c5ff97
font_01_sfnt_off0000f3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 10140 bytes
SHA-256: 8b71ddc0cadab006553f6b4eec5a59e6fd9c2a11aabb94e49d7b5275ed00a80e

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