Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80ad0db7a2b2a44…

MALICIOUS

PDF

44.9 KB Created: 2020-11-03 20:02:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2e4f95f9b14e2f450cce2b5adbd1f24 SHA-1: d5c6163224cd512959ed5216bdb6ea80298fd704 SHA-256: e80ad0db7a2b2a4487f60b2acf9f68af27a6a1ca19e880a585182c48dd08d71a
94 Risk Score

Malware Insights

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

The PDF document contains a link that directs to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body displays a "Stop error code bad pool header" message, likely a lure to encourage users to click the embedded malicious link. No scripts were extracted, but the presence of a malicious link and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/123?keyword=stop+error+code+bad+pool+header
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f92c3b154bb0.pdf
    • https://sagezawi.weebly.com/uploads/1/3/4/3/134322896/9903120.pdf
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/wuduzomadanomom_takezezonepoxi.pdf
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5f97d7d4a0c65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://uploads.strikinglycdn.com/files/3d83afa8-b067-4b12-982e-6d4511072cc0/detejejizu.pdf
    • https://s3.amazonaws.com/bokelur/gurowifu.pdf
    • https://uploads.strikinglycdn.com/files/d4cbf49f-63d0-4400-91d1-8431d53de8b2/android_apk_games_hacked_download.pdf
    • https://s3.amazonaws.com/dazemi/patofisiologi_stomatitis_aftosa_rekuren.pdf
    • https://uploads.strikinglycdn.com/files/3b1dbfcc-0c2e-4f1b-bd62-f50f7ba3bda4/94408069467.pdf
    • https://s3.amazonaws.com/gedimuta/duraxe_by_kyocera_manual.pdf
    • https://s3.amazonaws.com/pewibim/is_snape_harrys_real_father.pdf
    • https://uploads.strikinglycdn.com/files/d48115c7-12e6-47ca-9012-0b79fac4d351/skyrim_se_requiem.pdf
    • https://s3.amazonaws.com/zasepo/phoenix_wright_justice_for_all_case_2_guide.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dd0.bin
8a6fa7da1475c2add951cb05a0864e515caa9046f32ae83f1c0062600e88962d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD0 5228 bytes
font_01_sfnt_off00006f7c.bin
8fd491dcdebd01491d952bfa9c325184d4bf0357f7529d96ee386fc32118d087
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7C 6464 bytes
font_02_sfnt_off00008097.bin
a72a3935185fd049c07aaa9a3638231ed26e0882142066b469c452ad2546f685
pdf-font-stream PDF embedded font (sfnt) at offset 0x8097 10920 bytes