Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0157c6c60eb6be1…

MALICIOUS

PDF

35.7 KB Created: 2020-11-04 02:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 74fe3531f49aae3111f9a515b7f2f100 SHA-1: edd0e43ae520ce645f7523253491d936fd4a15aa SHA-256: c0157c6c60eb6be1c3f2fadaf671d9c637fa2605c9667a876ff95b3a18c87348
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is identified as malicious due to its inclusion of numerous external links, many of which point to redirector infrastructure. The primary lure appears to be a "2010 chevy cobalt lt owners manual", which is likely a pretext to drive traffic to the malicious URLs. The ML classifier strongly supports the malicious verdict.

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://ttraff.cc/123?keyword=2010+chevy+cobalt+lt+owners+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_5f9f7438704e0.pdfIn PDF document text
    • https://roxexiku.weebly.com/uploads/1/3/4/4/134445291/lisafimif_nikobixefu_kizudom_galuzowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f92e5031bb02.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/5075791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_5f92751224142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418583/normal_5f9ea4291495f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f8e943c781ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369493/normal_5f96bed7bd6a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f887653e4bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f8937bf69312.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/87fe6eb3-7819-4798-97b2-983866621e28/tipipirexigutapidev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a12d1680-525d-47c1-87a9-b498fbc8fdb6/eid_ul_fitr_2020_holidays_in_uae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c36305-7694-483e-b1db-0c59cd41da65/watch_hannah_montana_movie_for_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c92ec7-c839-4e47-b20e-9dba5b8bc52e/916-680-6139__-5903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f36f44f-3b48-4f26-a7bf-39308c1113dc/42077726544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ff0521b-2f14-47c7-b538-ba09a043d872/dotagobe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E56 5664 bytes
SHA-256: 38b0beb7fd40820ff90a753ac412e5026e80cf2b1f08435092a7c4fb58aaf85e
font_01_sfnt_off0000618c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618C 9448 bytes
SHA-256: 39f6b9449f3082bf67b475a962053550d754e9f59b3c1369ef9e40d3fe650f65

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