Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68508713155d60b…

MALICIOUS

PDF

80.9 KB Created: 2021-07-21 20:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e55cc442fa93743b7f499f01a0a2b48 SHA-1: 96ee667c3fa957d49331a60b4dfb68b2ff8c46bc SHA-256: a68508713155d60b6d94f4f88450573aae470ab9fa91dc5439294d13c76bcb74
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'synerhu.ru', which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://synerhu.ru/square?utm_term=difference+between+push+and+pull+strategy+in+marketing
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f03d916611482e0a9416a4/1626357137904/andhadhun_movie_available_on_which_app.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e81740efb14d112213d6bf/1625823040156/magnus_chase_and_the_sword_of_summer.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8fb1ab132fa362071ad44/1625881370293/cat_two_tone_face.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f81be83bf5736ec38dbc19/1626872808594/all_karate_styles.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f2c15cdeec581620284fd7/1626521948091/gajazatimakozolelemo.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f4d12927519501fc22ff4e/1626657065853/pakistan_mobile_number_digits.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f7765638a058373826452c/1626830422786/such_a_lovely.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f288c09ee5897bff99f33d/1626507456962/laromevoxiganitumatazi.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92ed1e6a58043b6921b0a/1625894609151/96927983594.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec9240cd1a1204f6c95331/1626116672260/endnote_office_365.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f6e3d34bd8f149757c2d2c/1626792916346/7_year_old_still_drinking_from_bottle.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f73dc43afd0d5549c9ec0d/1626815940302/42459338838.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f69ddafec50128e929d9f5/1626775003569/tefomosiwovofuralijezuwar.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0558687ee3075eb50a90a/1626363270741/womujoruliri.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7910dd2ac847ff7d8d80/1626110225136/pre_blessed_food.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_off0000da0d.bin
18ee4aaf24d6ddddb1d017552a9237c14391b0d6e659bf8a908dc1352049b14f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0D 15792 bytes
font_01_sfnt_off000102bd.bin
1335d8981b7953cf0ee9df13fd7df064326d9244127244f88aee949203aaa33f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 11480 bytes
font_02_sfnt_off00011d61.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D61 16792 bytes

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