Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8d3e7812af2660…

MALICIOUS

PDF

77.0 KB Created: 2021-02-25 19:18:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3817c81c1fa61e4e86a8c5d7f5b1d721 SHA-1: d5693f777fcd9c2df1cbcbada6ed6f76e3e9188f SHA-256: ed8d3e7812af266023960336a1dc33cf8079c6d63ef4ad5cc673b77ac8e1de98
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://bologen.ru/wix?keyword=ixl+algebra+1+u11+answers', suggests a lure related to educational answers. ClamAV detection as 'Pdf.Phishing.Trojan' and a high ML classifier score further indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://bologen.ru/wix?keyword=ixl+algebra+1+u11+answers PDF link annotation
    • http://nokasosozigof.mypressonline.com/69369111388.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/in_the_blood_suzan_lori_parks.pdfIn PDF document text
    • https://rapodiduwegez.weebly.com/uploads/1/3/5/3/135311990/dezoxudugunemiw.pdfIn PDF document text
    • http://prizinsta365.site/81685387728buau7.pdfIn PDF document text
    • http://godomun.iblogger.org/zematerafolota.pdfIn PDF document text
    • https://xakowinowuga.weebly.com/uploads/1/3/0/8/130814397/8085925.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/36614117177.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/med_el_sonnet_listening_check.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://s3.amazonaws.com/fazujo/guidestones_georgia_text.pdfIn PDF document text
    • http://tefozofikiduja.epizy.com/89832024462.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/31287225489.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/broken_screen_effect_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/61571276967.pdfIn PDF document text
    • http://vagaxalelevirot.epizy.com/tezibo.pdfIn PDF document text
    • http://segalufosirinep.epizy.com/tilumuza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E7 4784 bytes
SHA-256: 46ed3b9ca07625556f8d8f2efab23f87ae43355c2b94a496ffba3856a2a124b9
font_01_sfnt_off0000f441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF441 10748 bytes
SHA-256: 22428b441ff2b9b95898407ffd21645db8fa10c160d8fd6a982c4ae3695fce9c
font_02_sfnt_off000118c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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