Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cbdf1252a4aeb72…

MALICIOUS

PDF

83.0 KB Created: 2021-07-22 01:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d02feb5641b29e8f505c9764ab5d03e7 SHA-1: cdcd364a6e7dee1b925e57bf164ee0f1b01e6ed3 SHA-256: 4cbdf1252a4aeb72c60ad425c30a47114c30ae04946e766b5c432d51dd99db18
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'inwebjor.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to lure users to malicious content, fitting the pattern of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://inwebjor.ru/square?utm_term=bummer+meaning+in+telugu
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed5fc34918f36a6d5f7d74/1626169283376/vukasotejiwem.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60efff8034da7a51e3f3de85/1626341248853/70560660883.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f897be3515ea3202480916/1626904510370/boston_terrier_cattle_dog_mix.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f13eae8bcf896c915ff120/1626422958618/feather_in_my_cap_meaning.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f82c71759b3f6078aeb416/1626877042006/introduction_to_function_notation_worksheet_answers.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f680c64916b676e503c2bc/1626767558146/61031242878.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e95c5918245d33f18366e6/1625906265503/sakaxekevatutukezokov.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e95caf0a287971af9baca5/1625906351967/84037737242.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f13645e9ec2a4c2bda807a/1626420805551/see_you_there.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee365b2ee8b51fd934d80e/1626224219159/wanna_spoon_meaning.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee3e825f7927514e3d56da/1626226306281/wavekeposebemejukijakube.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e927e866be7e490f0fd9ed/1625892841156/16951573971.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7ae5a51cb2a526cfa4559/1625796186859/81094907945.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f89629accc405b10bb7501/1626904105883/examples_of_endoparasites_in_humans.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f59ff970e1af736d8c9324/1626710010208/78620322301.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e943c7c4c1a734c5d802a8/1625899976104/2009138445.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee5a90e7148d06bc72d2d3/1626233488337/56107239480.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f8907715b3010569c6605f/1626902647810/53191342846.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ea71b630645a0ef4a702/1625877105826/words_you_can_start_a_sentence_with.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f266bdb84a576e6cf72dd1/1626498749162/ffbe_role_ranking.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de2c.bin
3592d3cd2f68a09c592c172a28178ba0e4e890a9cdf1d93448526039ba7a7af3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 17988 bytes
font_01_sfnt_off00010d4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4E 16792 bytes
font_02_sfnt_off00012565.bin
f14a7a90912d2f0a99ed59bda57d1c7cc42a5afa5b6ebd59584426c90b347407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12565 10316 bytes

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