Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abc03659130223c…

MALICIOUS

PDF

46.2 KB Created: 2020-10-13 03:51:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0034c30485b88521e7e64dfa8c21a48f SHA-1: 3889d1dbc7cf993ba82788b93f2ab50dce409c34 SHA-256: 7abc03659130223c97fbb3fdf53fc3857a20500ca581d1dc9d819e32d8c4adaa
124 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, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL likely serves as a lure to download or redirect to a malicious payload, aligning with a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 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://ggtraff.ru/strik?keyword=retro+music+player+pro+apk+2020+espa%25C3%25B1ol In PDF document text
    • https://site-1038924.mozfiles.com/files/1038924/15765822678.pdfIn PDF document text
    • https://site-1043117.mozfiles.com/files/1043117/92913697156.pdfIn PDF document text
    • https://site-1042419.mozfiles.com/files/1042419/87385606355.pdfIn PDF document text
    • https://site-1038985.mozfiles.com/files/1038985/gadivemizotisasave.pdfIn PDF document text
    • https://site-1037178.mozfiles.com/files/1037178/kidiz.pdfIn PDF document text
    • http://files.herrmanndj.com/uploads/1/3/1/4/131410012/dijofovifamo_ponuwan.pdfIn PDF document text
    • http://zixamonu.migotoaquaworld.com/uploads/1/3/1/0/131070867/bepus_xorizelun_xuxapisujiku_laxolapibubejos.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/b520839a-1cd6-4ca0-b594-5911f87e7fdd/27054995411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08ccc7bb-97c3-4c99-876e-b1355cf1e28f/kolitizoduxasase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0c7a84a-e5fb-4c33-a11c-dd45057a0853/5755305727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc5f87c1-5935-4a97-8d48-d9aae0304325/kozojenufelewar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b04e0863-f198-40f1-bab5-a8b9712def39/gijabosutezotoxakamalabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3992/7703/files/the_artisan_soul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8150/8022/files/lesson_5_homework_practice_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8128/8859/files/23805895391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1882/5113/files/94479256112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4908/5847/files/church_of_the_magdalen_school.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7C 3064 bytes
SHA-256: d01e7d3a4e99b645d6ba9e0529bed8734a3e49056909a36afbc23c6aac238715
font_01_sfnt_off00006a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 5740 bytes
SHA-256: 0b0fdb59b3e279e2db7a213742619869c19d12e5e3fd01783e168a11c14af975
font_02_sfnt_off00007d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D78 1888 bytes
SHA-256: 7ef6cb6698fea806eec66effba9ae77859a8e18c03169e66e212b1421c87ab72
font_03_sfnt_off0000868a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868A 9772 bytes
SHA-256: 1419d7047b277bbdf21181a7310370333c0c89488ab5fb39cd4c3bceff8a16b0

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