Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e3c6dcddb77b27…

MALICIOUS

PDF

84.0 KB Created: 2020-12-21 20:29:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a210404e7458ea4a7f5ea50dde7ad45f SHA-1: a6f72453ea78535c78f4ebbf9bb84092ee33407b SHA-256: 40e3c6dcddb77b2710e9774e7e41e47d09ec3b19939b21c0e5118f640a4c5d47
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to hacking tools, suggesting a lure for malicious downloads or further compromise. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://traffmen.ru/strik?utm_term=bot+designer+for+discord+hack+apk In PDF document text
    • https://fomimixa.weebly.com/uploads/1/3/4/7/134775862/puwaw.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/5cbd12b4-a467-48a7-bc61-f2fe1de26c90/savepewazezexuve.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/c._a._r._forms.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/anti-_inflammatory_diet_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a80b0c-b337-47dd-b707-11ec3914fb83/skam_season_1_episode_1_wiki_fandom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a798ebe-9b10-41bb-adc2-21eae4cbb4db/86048747175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d506fc64-c306-44d8-9ffb-e2deb4b64524/8635897071.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2740a2757459be2c9b8/t/5fc14240cb3e0f57717d9af7/1606500929541/87852359362.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/4363144352.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfe9c7f67c863bcd18f266/t/5fe0331ae64f57031555b8b5/1608528666978/font_ariston_normal_italic.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3690c2e537a05ef19187d/t/5fc8733a6031f47386206499/1606972218910/extreme_mountain_bike_racing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27fd9a1-9d12-4336-8e17-49b73cbd2e07/zutodejojekaronimedi.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/personal_computer_definition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58a00bdb33045eee1a39e/t/5fd68960d654060362ce1034/1607895393508/peran_cacing_tanah.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FD 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000d6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F1 5288 bytes
SHA-256: fadee5ac4c1ce7692ab2b4b56919388866df571cfa94253288d3430635ee87b4
font_02_sfnt_off0000e8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DB 2376 bytes
SHA-256: 49b7d51deae63a9b8d8aff0a947c168cd15050dfe9ee3e12f6b8f9b11dd701f5
font_03_sfnt_off0000f37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37D 10488 bytes
SHA-256: ca014bdddbf57b66bc5ea6d3287470417b0a642af2e8a4b0a2e992851935c7f0
font_04_sfnt_off00011796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11796 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550
font_05_sfnt_off00012bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
font_06_sfnt_off000139b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B1 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df