Malicious PDF — malware analysis report

Static analysis result for SHA-256 004c412784636ee4…

MALICIOUS

PDF

86.8 KB Created: 2021-03-10 01:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a8751edbf7144c396e66bb49b2860a10 SHA-1: 4ade0f1d649d66a44baa0fce482a99eefd77e4a3 SHA-256: 004c412784636ee411a07d78443f1b0f885b59dbd087684ef0c749d66fc87e26
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/strik?utm_term=what+are+the+4+parts+to+darwin%2527s+theory+of+natural+selection PDF link annotation
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/3381ebf47c6f14e.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/the_mortal_instruments_city_of_ashes_movie_2018.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/majirefomopozufikumag.pdfIn PDF document text
    • http://cheapkeys.site/265223240268rhb8.pdfIn PDF document text
    • http://wiregabjuk.fun/assetto_corsa_understeerpe8l4.pdfIn PDF document text
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/sazujaronijejapones.pdfIn PDF document text
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/3187490.pdfIn PDF document text
    • http://manibupefif.mypressonline.com/back_office_job_interview_questions_answers.pdfIn PDF document text
    • https://nulixosur.weebly.com/uploads/1/3/4/3/134311840/sojenosonus_buxeburawuw.pdfIn PDF document text
    • http://astrology-personal.online/how_to_make_an_evaluation_planjxnt1.pdfIn PDF document text
    • http://gonzo-3d.com/kefotawes5yb91.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/21952744023.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/c2e539f6a69b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiforeru.atwebpages.com/96190371056.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/chakra_test_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364ed3dd-1940-4a17-99c1-35db7bb3eb54/dafomatepugidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45371fe-a334-44cc-8727-8d133c406aa0/harriet_tubman_biography_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1c3d20-c865-42de-be1b-89f44e839496/digebopetaworatijevurido.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/15402965049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c3c9ea-1335-4265-b04e-5095a2c93a74/insinkerator_excel_parts_list.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/how_much_does_a_hoveround_scooter_cost_to_rent.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/samsung_un40j5200afxza_screen_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/fawiwume.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_off00011631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11631 5572 bytes
SHA-256: bebc59f559b4fa3c07566e4a15b20edf9ccb7a81eceba6053f68636336b4fe31
font_01_sfnt_off0001294c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294C 10696 bytes
SHA-256: 7ab01fbb1818dca7fba6ce36f9b00ac7ba7b04d461e7f5b6ffb2e7cb2b9adaa2