Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d624965adadd24…

MALICIOUS

PDF

226.0 KB Created: 2020-08-09 11:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84d73e38429b96c39ac64dec9ae88f22 SHA-1: 5cd867395ae221fdbffc8641bf8171273e8da145 SHA-256: 81d624965adadd244d4107c8c3828af15c10020b66b87e0630ad5d0fba207118
94 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a biography of Mahatma Gandhi. This link, however, redirects to a known malicious domain, indicating a phishing or redirection attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 3

  • 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.
  • 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://ttraff.ru/pify?keyword=mahatma+gandhi+biography+in+english+pdf
    • http://files.caseylynnroland.com/uploads/1/3/2/6/132695401/pilelu-daxurerosagevan-vedujoki-gubumuguw.pdf
    • http://files.forummanajemen.com/uploads/1/3/0/8/130814284/f0449eec11829.pdf
    • http://files.bedminsterpto.org/uploads/1/3/1/4/131438151/5b6d37.pdf
    • http://sedikape.walkpositano.com/uploads/1/3/1/3/131380213/ba079161528636.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.indictrans.org
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/puwolitijupor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38140624907.pdf
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/falonoruma.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/56150732122.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/alive_pearl_jam_tab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2322/files/54919342152.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/tuzezixotivukesosuzer.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/kilikelotejorobuja.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/nintendo_switch_soft_reset.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/merenojofoturewugigov.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/11364938158.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/86194361352.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/beijing_subway_map_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/back_propagation_neural_network_algorithm.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00032202.bin
24d6447a0516b565a057ba628cb194607761b83c5d6d345f089b7eeac65800e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32202 5704 bytes
font_01_sfnt_off00033548.bin
f21b05a2340b363a1ed8b0bbfc234bf9da5e90c1c639b98be765a2f280f9ba06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33548 5236 bytes
font_02_sfnt_off000345d5.bin
ddfce2a990dbd9e6826606ecc34898f665de4d5f1969d0a726b48efa7295426e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x345D5 12224 bytes
font_03_sfnt_off00036d8b.bin
512483c57a24b4352d2eeec5a7eab8e187acc91fc8ae1234fa79abf12fac9a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36D8B 2688 bytes

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