Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4d7505bed86eda…

MALICIOUS

PDF

52.3 KB Created: 2020-10-22 22:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 645a52a0eabb8687a88ed144f65400e8 SHA-1: 9fd82e96263d60b61a1e09b8b4c48361c6115b48 SHA-256: fc4d7505bed86edafb739eb76ff57c1810f07ef8f47f40bd5c98caa48cb29c21
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL and keywords that likely serve as a lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 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.
  • 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://gettraff.ru/123?keyword=ecologia+de+comunidades+pdf In PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/vevawuvi.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4056517.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/favepin.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/3794757.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/d958b2.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/1571198.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/9706699.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/c26879.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7645/8398/files/pihu_netflix_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8415/5553/files/kifen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3776/0917/files/fepejofogasinirogexen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4012/9202/files/33442106436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/windows_7_android_software_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6563/3699/files/tibelesowunexitefogodoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11bb3677-c2b3-466a-8175-361a4a3d8628/peronuzobipaxoxaruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0411660a-5150-4514-96fb-afe4b3789885/repaxumapofoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98383a79-3cb7-482d-acae-feac0957f298/pixoxozozikep.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/apocrifos_del_antiguo_testamento_diez_macho_tomo_v.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/la_boite_a_merveille.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/84549843231.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/advanced_calculus_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/home_workout_book.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6860 5136 bytes
SHA-256: 6fc9f4b9c7af7daa52647c02bbba60dbf0a06a060384a87ecc1d99dcebb5c5b5
font_01_sfnt_off000079c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 10560 bytes
SHA-256: aa020bb26054619a6f28a39783e0a8da36d666dcae52c85b7cff9d4261753447
font_02_sfnt_off00009c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C5F 16600 bytes
SHA-256: 820a32f50b44dd5ab6ad96b3c578673c3125bae58b3daa26e8c609e7e7169013
font_03_sfnt_off0000b340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB340 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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