Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea127d6c9f253226…

MALICIOUS

PDF

84.4 KB Created: 2021-03-15 13:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eac79688d7f89b852653bfdc2df1f0e3 SHA-1: def7454443aa1ac7887f20f6bda4afd582fff1b6 SHA-256: ea127d6c9f2532269e3a0244a37cce4997162c3d0e5cce05a8814827cdf9d895
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated for SEO purposes, indicating a link farm or spamming operation. The primary URL, https://ponafet.ru/award?keyword=actos+de+comercio+colombia+pdf, suggests a lure to a site that may host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/award?keyword=actos+de+comercio+colombia+pdf
    • http://mojofaza.mypressonline.com/panasonic_bread_maker_parts_singapore.pdf
    • https://zosojelukik.weebly.com/uploads/1/3/1/8/131871698/230375121fab.pdf
    • http://kamini33.ru/mitorafn5vi0.pdf
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/0d287.pdf
    • https://cdn-cms.f-static.net/uploads/4464541/normal_6045f9de9f8e8.pdf
    • https://cdn-cms.f-static.net/uploads/4381997/normal_6028374533626.pdf
    • http://euroshopme.site/what_christmas_movies_are_on_netflix_2020ahdxs.pdf
    • http://podarokinsta24.online/getting_to_yes_roger_fishert3fo4.pdf
    • http://gifagudilul.mypressonline.com/mofefavilafefus.pdf
    • https://cdn-cms.f-static.net/uploads/4420761/normal_60426fe612171.pdf
    • http://kilekapalovuzo.getenjoyment.net/xowosidaselunoge.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fajetufekejo/cbse_marksheet_2012.pdf
    • http://bizedesaxifu.onlinewebshop.net/80013258571.pdf
    • https://s3.amazonaws.com/sifawekujiki/37498069976.pdf
    • https://s3.amazonaws.com/pazerogasarinu/allahabad_kondapuram_lo_ringtone_song.pdf
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_419f95a53db040eeb575fad2c205657b.pdf?index=true
    • https://36425c1f-c329-48aa-845d-1f8252cb45c8.filesusr.com/ugd/01d500_516712296d2a4bbe8259356678d4abf8.pdf?index=true
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_ba4f47362b494b95b3d451824ef02e7a.pdf?index=true
    • https://s3.amazonaws.com/rotowan/meaning_of_android_in_english_language.pdf
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_c79a48720b4e4f74a712de48102e5020.pdf?index=true
    • 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_off0000e69f.bin
2a1879e5a3c3a6e72a87ca7c0a8a036dc3705ce67e3fafa3bed0b0ffabbf1102		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE69F 5112 bytes
font_01_sfnt_off0000f7f4.bin
5ff8ad3e11a3d56a10314dfa32c59efb75a20d451860470e11c8efcbd006ef3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 11908 bytes
font_02_sfnt_off00011f04.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F04 16204 bytes
font_03_sfnt_off00013432.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13432 4324 bytes

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