Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a8933628ab5cb3…

MALICIOUS

PDF

92.1 KB Created: 2021-07-22 16:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3e8bb3810dc77a14092510dcbec0723 SHA-1: 92a9bdfcd6271bb64e430bafb7fae6cd95b44c20 SHA-256: d2a8933628ab5cb3cee9a31e924ab07e47389a78b950b94077e683214303122a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML detection strongly suggest malicious intent, likely involving user interaction to navigate to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://feedproxy.google.com/~r/sq/ugae/~3/uzX87CUNjRg/square?utm_term=full+throttle+remastered+achievement+guide
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f6c63729bae44eac751104/1626785335592/st_patricks_day_color_by_number_free.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f767ebfb40a255c5358a93/1626826732294/indian_statistical_service_syllabus.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee738c588fb5669517b0c6/1626239885047/how_to_screen_record_on_my_iphone.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f881ead8601742b3d04293/1626898922855/nefimuxevamotibididerini.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f71bf36a8e8958a78baeb1/1626807283232/to_be_acquired.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0970f06b4922924b562a1/1626380047743/mechanics_of_wave_forces_on_offshore_structures.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e80ab2efb14d1122133e7c/1625819826717/duwewubi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1f885c5becd4b2f0b98a4/1626470533753/53645321523.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee023dd6ef6771c1dfb96b/1626210877327/vajodaduvu.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f7de8d38a05837382b935f/1626857101510/surgical_treatment_of_infective_endocarditis.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8efc658c6623f037fb3c7/1625878470859/95113464308.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f33e2b7f94c710fbc4b2cd/1626553899652/29448949084.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f40bf781f38b20588dbb40/1626606584095/fillable_2020_w4.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f5edb9bb22fe09a2b33f76/1626729914031/71998194553.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8361381471576eaf0f547/1625830931568/negotiation_between_labor_and_management_is_called.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f71f5a2b90d0393da6dbec/1626808154420/fedukitosegupiloga.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee738b2485902f3e76af26/1626239883269/bees_cross_pollination.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60efe42139c5d52effb5666a/1626334241565/59775591084.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1fb2c79ed255f8b5b6566/1626471213086/roxageroxofazole.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f367357f94c710fbc6d0c9/1626564405448/rupikitew.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f66f292919ae181dca4679/1626763050070/32625746859.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecac4c05183b3b57a16509/1626123340066/remorolorufok.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_off000104b2.bin
72d20d9477cd4772103e175d6b0635d9403903d0fad99d16fbffd8b088773255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104B2 16720 bytes
font_01_sfnt_off00013043.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13043 16792 bytes
font_02_sfnt_off0001485a.bin
d278f78301417e2741bf6848803aee50d23344b86663760038767adf28c8b7c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1485A 10960 bytes

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