Malicious PDF — malware analysis report

Static analysis result for SHA-256 596516b590811a96…

MALICIOUS

PDF

78.2 KB Created: 2020-12-19 15:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d081fa3c83baf50bd1d2997fc102df3 SHA-1: 19323eca5755b29492e54902fe3bb37ccd73f051 SHA-256: 596516b590811a96a7a588c6c2f08448fd1c60145fdb72bd730fb91f8012d06c
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting it's part of a link farm designed to distribute malicious content. The ML classifier and ClamAV also strongly indicated maliciousness. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=capricho+arabe+guitarra+tab+pdf
    • https://gefetejumifigo.weebly.com/uploads/1/3/4/6/134688955/gefokewodabapal_lemumapuz_visoju.pdf
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5fd2c0c9bba5c.pdf
    • https://bupagaxeni.weebly.com/uploads/1/3/4/7/134706040/kebinulinelakutelage.pdf
    • https://kunulidozejenu.weebly.com/uploads/1/3/3/9/133997834/dibukob.pdf
    • https://nusisudarebo.weebly.com/uploads/1/3/4/3/134349377/rubefa-fagitaba-pozivujobes.pdf
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5f9d11bab63f4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc2b80e5bcb0228a28e2589/t/5fc6c761b2fa4660c8be9d67/1606862690695/38039538295.pdf
    • https://static1.squarespace.com/static/5fdc7b6f43483e57e2cf12c2/t/5fdca621ef3da3664b24d1e3/1608295969968/48955571359.pdf
    • https://static1.squarespace.com/static/5fc7794ad8c365012837dbc9/t/5fd5f085164d0f203c6fa599/1607856262472/42085414088.pdf
    • https://static1.squarespace.com/static/5fc5da01bda9c57a97e01dc8/t/5fd6945adf2f0204c23ecaad/1607898202797/27915017750.pdf
    • https://static1.squarespace.com/static/5fc2d4f52cf09257bd788e5f/t/5fc6a27ebc819f1cf4c1f07d/1606853246617/marketing_management_meaning_examples.pdf
    • https://static1.squarespace.com/static/5fc5b109405d5340f34a7138/t/5fcff0cc4e43280751303cd5/1607463117429/bunofipepijixifodo.pdf
    • https://static1.squarespace.com/static/5fc6941c1452f90b7f0c5d7b/t/5fcf24bb7c36362741a94cf2/1607410876684/royal_funerals_brochure.pdf
    • https://static1.squarespace.com/static/5fc4f926a879396864223f82/t/5fcfa0597c36362741b7939e/1607442523082/pet_shop_story_game_mod_apk.pdf
    • https://static1.squarespace.com/static/5fdc9ff03a83d042422c3343/t/5fdcffc18f65117591028081/1608318913358/13058982527.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d297.bin
e10dc073c33915de072d595ff2baec03919cda99a8d2faf37edf48ca6f051df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD297 5144 bytes
font_01_sfnt_off0000e42d.bin
f5f2cf157ccb333fb1e26a500146cc770c8897d52c0ffd8cd744e1dbbdf6d8ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE42D 10516 bytes
font_02_sfnt_off00010865.bin
ebf689d51ed3b58778ccf7ee11078071a21d17262a377a1c882137165fc51b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10865 16076 bytes
font_03_sfnt_off00011cfe.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFE 4324 bytes

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