Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3816721fac9fe3…

MALICIOUS

PDF

45.1 KB Created: 2020-10-28 05:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dd58b38610e1245e4b12b5cbeaf51036 SHA-1: b9938b8285b148c2d4f244bd06be1cf71ad60e11 SHA-256: 2d3816721fac9fe3d6cf1faeba96d012cc2f9312ce068ac2e14b6541524e2ea3
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on Weebly and appear to be part of a link farm designed to distribute malicious content. One prominent URL, 'https://ggtraff.ru/wb?keyword=d'link%20wireless%20n300%20router%20manual', suggests a lure related to router manuals, likely to trick users into clicking malicious links. The ML classifier strongly flagged this PDF as malicious, indicating a high probability 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://ggtraff.ru/wb?keyword=d In PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/412712c4.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/soxonosata-lepanoditos-subizolare-zatunama.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/zelufigav.pdfIn PDF document text
    • https://sukowaletudevux.weebly.com/uploads/1/3/0/8/130874669/7048c98620.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/lokujevu.pdfIn PDF document text
    • https://nuzilemuf.weebly.com/uploads/1/3/4/4/134479477/5400807.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/663f7b7b1d3d.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/7858001.pdfIn PDF document text
    • https://rosikotukixaru.weebly.com/uploads/1/3/4/3/134312973/9be05a.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/kusutonewu.pdfIn PDF document text
    • https://kijudizi.weebly.com/uploads/1/3/4/3/134321523/lomegon.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/ed77146280debe4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1456/9115/files/anahuac_isd_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7040/0928/files/dd_5e_monster_manual_lycanthropy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3952/8872/files/rastakhan_rumble_dungeon_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5269/9300/files/can_and_could_exercises_for_elementary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1382/2390/files/26278549219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6574/4801/files/nowokafidevaliwekudedez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff6e5fa-b99e-4dc2-b8db-9d5df9c0b2ce/kakumuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a6b95a-4634-4473-a56c-a3b5a6edc636/48249998438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba63d75e-35e2-4269-b6b1-941be5d61cd6/zapojaririgotonur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d13a4a20-bdd6-4ff8-beaa-23a6e1584156/20183945770.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_off00006ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF3 5328 bytes
SHA-256: e92c650ecba8223100056d8890bbc98964e53e7601fc7674c8a6f037947e0b7c
font_01_sfnt_off0000820e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820E 10852 bytes
SHA-256: 730ea9bc5194cca9a63c97b6ff916ef7c14ada42696ca451467797192373463e

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