Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1534cba104bcf08…

MALICIOUS

PDF

47.6 KB Created: 2020-10-16 15:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0e0965ef736e035ab0ba262f51aef643 SHA-1: 934b0cbadc9805fedb1ca0005fcc18c0384cfdc0 SHA-256: c1534cba104bcf08d4626f0be1f57b8bf37617e56ab2d6fc94d24c7f0ad8f945
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains URLs that appear to be part of a link farm. The presence of a password archive lure heuristic suggests the document may be intended to trick users into providing a password for a separate malicious archive, further indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gettraff.ru/123?keyword=understanding+and+using+english+grammar+5th+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f88ec1a220de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f88adeae57cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f875aac8ada2.pdfIn PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/849680e3bdc5926.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/9296576.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/4255750.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/zolud.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/rotizizalipi-xulejowo-wegevok-xutijub.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/sixasunusimu_vezaninume.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • https://wivepeweg.weebly.com/uploads/1/3/1/4/131455463/9550097.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/2441207.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/9742380.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/zodimepelutol.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://cdn.shopify.com/s/files/1/0496/1825/6035/files/carson_newman_baseball_division.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7424/7069/files/89444363566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/all_bond_james_bond_lines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/26973071041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/prentice_hall_gold_geometry_form_g_answer_key_6-1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2931/7790/files/6970621292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9436/0735/files/vuzodarituwotaxi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51CF 8604 bytes
SHA-256: fa962ae080bb20e6b7f95d632fdf20f261332ad8332460960b0923a1170d2d91
font_01_sfnt_off00006e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E87 5340 bytes
SHA-256: 57b79df6edd333025e3d1a7a78403748cac1eecc762bcb11c63df722ff5cfbbb
font_02_sfnt_off00008079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8079 9844 bytes
SHA-256: 7710be4fc4af7ebdbc7ca4e9b45ba709c7e4a15c22b6d0f2a58c50775a463141
font_03_sfnt_off0000a21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA21C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71