PDF malware analysis — malicious · a2ac128ba5edd1d4

MALICIOUS

PDF

77.0 KB Created: 2021-07-12 22:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 8da1a3b0d26d9d2280be2e859d3b76ba SHA-1: e4bdb96f5f87e87121ecf01a5efbb794250d7409 SHA-256: a2ac128ba5edd1d4639f44c5c7be3826c43b54e0c0120804ae54eab7cfe50f11

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The PDF structure itself does not contain executable scripts, but the embedded URI is the primary indicator of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9680

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://philabc.ru/square?utm_term=editthiscookie+extension+chrome
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e812507d3b385c94b7ab49/1625821776808/291752243.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d4745ef51a130ea0d53a/1625871477088/gapuvadetekutunuzilejatig.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8409dd2ac847ff7ea91a/1626113033982/adults_throwing_tantrums_like_toddlers.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7cb548592fe3a58910e6a/1625803604846/kugevevajokanikigazisu.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8fc03566ded7d61ab5b26/1625881603701/lexuwuvaponotuwapa.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7a9519a16f038d61680d/1626110613306/68992694368.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec85d40d838b6c850d2711/1626113492217/gender_dysphoria_disorder_icd_10.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c10f95719b356d9178c3/1625800975531/plotting_inequalities_on_a_number_line.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cb7f.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCB7F	16792 bytes
`font_01_sfnt_off0000e391.bin` `a474233715a5d4f8f54801d3703b08305ae10940dbfd71923300e7b0edff1603`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE391	16952 bytes
`font_02_sfnt_off00010fab.bin` `7c3e965bf154342469ccfd92d3f4a7bb7f240e8082c829cf427925457c5363a6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10FAB	10604 bytes

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