Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c51e35bc2ce107…

MALICIOUS

PDF

47.6 KB Created: 2020-10-03 15:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c917251418040db3a5242b599ed53f57 SHA-1: ed273b19c451492890cd3096d83add0b4109fcd4 SHA-256: 00c51e35bc2ce107d62d604321e897cdf26afd5a34b459424198bc4f482d30fb
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating an attempt to lure users to malicious content. The embedded URLs and the heuristic firings strongly suggest this PDF is part of a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

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/strik?keyword=diabolik+lovers+game+english+online In PDF document text
    • https://site-1039817.mozfiles.com/files/1039817/59976596929.pdfIn PDF document text
    • https://site-1037849.mozfiles.com/files/1037849/33432811005.pdfIn PDF document text
    • https://site-1038852.mozfiles.com/files/1038852/45543372157.pdfIn PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/18742998404.pdfIn PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/87253624949.pdfIn PDF document text
    • http://files.briankirschcapetown.com/uploads/1/3/2/6/132696351/c998c43120ca.pdfIn PDF document text
    • http://bilokupa.artstudio491.com/uploads/1/3/0/7/130775755/5f5b089.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/1/0431/8609/4229/files/presidential_traverse_shuttle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/9817/7181/files/begawijomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9184/5016/files/topics_in_algebra_herstein_latest_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2424/5155/files/brahma_sutras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6190/6074/files/popcorn_apk_download_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f82a35-b56c-4b1d-a562-89620a09693f/92349271016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d4588b-b904-499d-a962-78a4059ca9e2/zebarisulubepifo.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_off00005d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D67 4816 bytes
SHA-256: e58d22b6183cb003b3171a0496e9ee32ae09bb5770354d9870b66360f846fd55
font_01_sfnt_off00006e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E10 5068 bytes
SHA-256: 1d53c7cbacd5efd9c9999c7383ecf6d9bf5a012020bd5cde1a2674308f9b50ed
font_02_sfnt_off00007f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F11 10608 bytes
SHA-256: 405c0e449725af7b68213bd424aa1160df9077ef728dcb2196f190bfcbc40584
font_03_sfnt_off0000a2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2EE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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