Malicious PDF — malware analysis report

Static analysis result for SHA-256 51637ae4b9ec4bce…

MALICIOUS

PDF

89.0 KB Created: 2020-12-04 13:03:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f197e96f7e608fbb417e754d583a39c SHA-1: 7edc985b93f3308fbbb55e90cbc56fddb771a910 SHA-256: 51637ae4b9ec4bce634dc2479f52991d1d666f1938de22fd04d58dc5c9044751
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ggtraff.ru/aws?utm_term=filmywap+bhojpuri+movie++2018', which is likely used to direct users to further malicious content. The document body, though heavily obfuscated, contains references that align with the link farm heuristic, suggesting an attempt to disguise malicious links as legitimate document resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ggtraff.ru/aws?utm_term=filmywap+bhojpuri+movie++2018
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/b13c275fb5963.pdf
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f9b1ec5648be.pdf
    • https://zixamagexiwu.weebly.com/uploads/1/3/4/0/134012381/foxufasubosekog_legilexotizudo_gisatofawomekag_raruvigafu.pdf
    • https://gigewabiwijezu.weebly.com/uploads/1/3/4/5/134576475/bazave.pdf
    • https://rugisuvo.weebly.com/uploads/1/3/4/4/134438002/rogup_tonivomuduwa.pdf
    • https://wusaveverafojiz.weebly.com/uploads/1/3/4/3/134338410/3ce83fc204e4c75.pdf
    • https://cdn-cms.f-static.net/uploads/4417675/normal_5f9c9b0bc577e.pdf
    • https://xukaxikerebata.weebly.com/uploads/1/3/4/0/134042698/wosajujotunakarexug.pdf
    • https://musufofijadora.weebly.com/uploads/1/3/4/8/134888277/zoluzat_buwulove.pdf
    • https://rowevitos.weebly.com/uploads/1/3/4/6/134687190/lujurekarewo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/63bf9b20-83e7-4269-bef0-1d0e2c77dc09/ancient_china_map.pdf
    • https://uploads.strikinglycdn.com/files/ea6ab840-ea91-4bbb-85b9-f2ee5be58f2f/preguntas_para_la_ciudadania_2018.pdf
    • https://uploads.strikinglycdn.com/files/b83e6141-1680-449c-9187-d4f191b43d7a/48405389567.pdf
    • https://uploads.strikinglycdn.com/files/260144a2-0045-4e4d-8934-771847355fd1/map_of_napa_valley.pdf
    • https://uploads.strikinglycdn.com/files/3e31ecbc-60c2-48ec-8f48-69d2a71ab174/50072570579.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011281.bin
f6f7f73892657663d5a71adc3db0e9fdca0cb0c572d4d6da172b9e1de95cddb8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11281 16612 bytes
font_00_sfnt_off0000dbbd.bin
ce311da6f477bf75bdd2038581724ebb76c5fbc131d3066f000089e30cfbfe97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBD 5524 bytes
font_01_sfnt_off0000ee96.bin
a0fa0fb7691ddeccdb801f8593aabb3be8ea34c8de27d27f2684f6705b52fbf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 10596 bytes
font_03_sfnt_off00012969.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12969 4324 bytes
font_04_sfnt_off0001376a.bin
1b48af289ffa3eb6050cdf442c54f5462575ec9be74ccf33c6a6b6705855b7cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1376A 9328 bytes

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