Malicious PDF — malware analysis report

Static analysis result for SHA-256 324e3687229fe018…

MALICIOUS

PDF

80.8 KB Created: 2021-03-14 19:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 19a8318f704c55130b9c3f7a49b274b2 SHA-1: b04cc1dd09aa2a49f527caa6bf9311c1eb18df79 SHA-256: 324e3687229fe01887704a8c5fe32317b522e9dcaa64469fd46f1c101ab08511
126 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One heuristic specifically identified a "PDF_SEO_LINK_FARM" with 30 links, and another flagged it as a "PDF_SEO_DISPOSABLE_LINK_FARM". The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/award?keyword=pathfinder+character+generator+pdf PDF link annotation
    • https://cdn.sqhk.co/pofifarim/gcibBuD/qr_code_reader_barcode_pro_itunes.pdfIn PDF document text
    • https://rilulukopidu.weebly.com/uploads/1/3/5/3/135323077/lolawajolokopap-jimeladu-zavazakunifez-xineguwaxe.pdfIn PDF document text
    • https://patapirebitogi.weebly.com/uploads/1/3/0/8/130814085/zekebuti.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/Ejchahf/xosalofirujirinirajomipi.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/dipek.pdfIn PDF document text
    • https://cdn.sqhk.co/gulijolane/ejbjgEu/sawalesexosisuziwejajez.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/81834067838.pdfIn PDF document text
    • http://gugolufixa.mywebcommunity.org/sharp_el-1801v_replacement_ribbon.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/sifawazevozugezuvapudab.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/iiig0lh/zuwavud.pdfIn PDF document text
    • http://pujipaxubeko.22web.org/16184589218.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/Bwjdgjp/28865319275.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/iDfhghe/88637090942.pdfIn PDF document text
    • https://cdn.sqhk.co/jetekujob/bidhdWG/rec_screen_recorder_hd_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fudixuxutinizow.rf.gd/sixorimizugerobus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c24f3975-c3e1-45fe-a743-1ec4e24da406/22580461157.pdfIn PDF document text
    • http://zijowosep.rf.gd/symbolic_interactionism_genesis_varieties_and_criticism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/911c2de2-633c-4818-bf0f-2735ad04f4c3/dimupakeleji.pdfIn PDF document text
    • http://muwadobekele.rf.gd/gixabanaramovabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2eb2d8-051c-4bad-a070-335223d52175/xezibipazowofomade.pdfIn PDF document text
    • http://muvelexadaw.epizy.com/dhb_cycling_shoes_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1926cb5-ec9b-46c2-91e0-cff2f9caa71a/zasodibuta.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/libro_de_fisica_3_secundaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c1f2d1-3a59-46b4-bc10-578354847f04/pedesojigakokukovaga.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/51789036900.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_off0000fbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 5208 bytes
SHA-256: 3caee0eae9b3efb7f2836da295c32bf92695d1d7a894403d7ab03ca15c5f5c64
font_01_sfnt_off00010d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D72 11988 bytes
SHA-256: 24d0572e4fdd46b154db4916b6b9c271f8e0a4496f6489b234648d28f8c9b909