Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8e1ba01cc9db73…

MALICIOUS

PDF

46.8 KB Created: 2020-10-29 13:22:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8e44f69d7116cec1705b8f38aa0b7512 SHA-1: 83ea1c212c83ebf57e6da03df05fb7dbedd6afa7 SHA-256: 8d8e1ba01cc9db7301da9800a0cc329a5c3354b008c654567357292a61d74da4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external resources, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic, suggesting an attempt to lead the user to malicious content. The ML classifier also strongly indicated maliciousness.

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 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://cctraff.ru/aws?keyword=bless+unleashed+quick+leveling+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415951/normal_5f97bc067437a.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/biviti_fokomuguf_lamezazerifa_xavijamixevuxe.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/698664331d800.pdfIn PDF document text
    • https://ligavovifoma.weebly.com/uploads/1/3/4/5/134522072/92ddc7a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410731/normal_5f959925bd1f4.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1109957.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/weguki.pdfIn PDF document text
    • https://nugaginidej.weebly.com/uploads/1/3/4/4/134475369/jegel.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/65bd0bc759.pdfIn PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/kovonolapevajak.pdfIn PDF document text
    • https://keregejuvuja.weebly.com/uploads/1/3/4/3/134345288/bawen.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://uploads.strikinglycdn.com/files/2459e1f6-a179-41ee-87dd-6ad92fd04411/1832701724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4995/7553/files/19592073297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3432/8219/files/97204614243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0024/9538/files/wedding_card_format_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a92c3c-1298-434a-a83f-bd7e14d5e2d6/christmas_lights_lexington_sc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4982/6504/files/nuteboxilepozaxube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5475/7575/files/serious_illness_conversation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1731/1660/files/kulapakimaxagerifofufuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7133/9194/files/bayesian_theory_bernardo_smith.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/world_bank_report_2020_sinhala.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7E 5096 bytes
SHA-256: a4bc8d44c69c196b941a4e440f8776b98879be27359dcdc32d3c8c5f34645dee
font_01_sfnt_off00007bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBC 10596 bytes
SHA-256: 7ec9e3edf96e6df45996642438dbeccb5ca5df904012743e89ed5bdc222ad78b
font_02_sfnt_off00009f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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