Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b8ecfecfaca5d2…

MALICIOUS

PDF

82.4 KB Created: 2021-07-22 03:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42904a87a4345785632d5d16f97fbb72 SHA-1: a9a97d519b9360533b345d8e1d67194cee96b422 SHA-256: d5b8ecfecfaca5d243a61e0392ca2eee6440d79ea988f59f958fc360714946bd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'https://allytemp.ru/square?utm_term=we+want+answers', which is likely the phishing destination. The PDF structure and embedded content suggest an attempt to trick users into visiting this malicious site, consistent with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://allytemp.ru/square?utm_term=we+want+answers
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d7d8661f643e3a12e433/1625872344125/fun_facts_about_volcanoes.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f893b022b0bf63072a9c02/1626903472501/60105081900.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f35cc54f27972c604142e9/1626561733482/an_introduction_to_sociolinguistics_janet_holmes.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f28f27e615ea111e61a241/1626509095183/pdf_to_all_converter_software_free_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f89060bfcf5919e9538cf0/1626902624666/mount_rushmore_before_carving.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f06a36529fbe08b0aacd00/1626368566715/another_centurys_episode.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e880fdd34893089c5a8835/1625850110066/52235348326.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f22fed890fa5305bdb8d46/1626484717976/salala.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f307f16c177f33d79eb619/1626540017963/17068605473.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e79b014aaab0286a872aef/1625791233135/dadovavuvut.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed27318c96c6301f916bfd/1626154801614/41990419780.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f56d81e13ee9766620b975/1626697089567/eyepiece_microscope_function.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e95281566ded7d61ae1a92/1625903745805/pace_health_pedometer.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f6195580a0646c0003e036/1626741077875/38702005021.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ede013172ba47bdac3f307/1626202131691/of_mice_and_men_allusions.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee830977e2cd4113f3b1b2/1626243849352/how_old_is_the_earth_based_on_the_bible.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7a11446a8e17713e1943a/1625792788738/pozufadogulofomewubi.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f4812a6f785f5832666b/1625879681717/52980918417.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f7872a592bc62482ebb8e4/1626834730919/child_ent_specialist_near_me.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_off0000e3a1.bin
db931cccb8d668ab4d9484ab454a44aeb0688977385573d3d6f85d9fbd972fc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A1 16084 bytes
font_01_sfnt_off00010d1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1A 16792 bytes
font_02_sfnt_off00012530.bin
ba95e074bdfff7c7e51ed030b88160f844a40803b0a3971108afa516a5220d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12530 9924 bytes

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