Malicious PDF — malware analysis report

Static analysis result for SHA-256 183f4e2071cafdaa…

MALICIOUS

PDF

117.9 KB Created: 2021-03-26 18:05:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acf8ff6bfecf07a92210e9d6f51d1195 SHA-1: bb3e2b5c0daae0aecf70cecfd3f7d4b73dfc4324 SHA-256: 183f4e2071cafdaae5df98f36e5dafdb13f4a67c618edc4f2094b7a99e1d2f43
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://vilenefex.ru/award?keyword=enzyme+catalyzed+reaction+pdf
    • https://static.s123-cdn-static.com/uploads/4408863/normal_5fe179bdb9b65.pdf
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5ff1f0dbf32bd.pdf
    • https://cdn-cms.f-static.net/uploads/4454306/normal_601b70862adc3.pdf
    • https://cdn-cms.f-static.net/uploads/4470689/normal_604ceed733235.pdf
    • https://static.s123-cdn-static.com/uploads/4412774/normal_5fe163761a7bd.pdf
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5fd6584fe3cef.pdf
    • https://static.s123-cdn-static.com/uploads/4503767/normal_5fe35a620aeb7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kekunulu.epizy.com/jikenaxalifala.pdf
    • https://s3.amazonaws.com/rewepalazamiso/warframe_switch_guide_reddit.pdf
    • https://uploads.strikinglycdn.com/files/b4056a64-3474-4f12-8b12-afe1bc764030/latin_american_literature_novels.pdf
    • https://s3.amazonaws.com/lukepepe/zemawev.pdf
    • https://uploads.strikinglycdn.com/files/971792a6-2b6c-40d4-a78f-60c71bd8c49a/warrior_cats_books_series_in_order.pdf
    • https://s3.amazonaws.com/tojazudibumogab/balisanox.pdf
    • http://fomepufasele.atwebpages.com/linixutiwebulatow.pdf
    • https://uploads.strikinglycdn.com/files/60a9aba2-a97a-4368-b397-d0ab1ef2a521/3204520472.pdf
    • http://nixaruxabonijiw.rf.gd/66367148503.pdf
    • https://s3.amazonaws.com/jimugivos/guidepost_montessori_chantilly.pdf
    • https://uploads.strikinglycdn.com/files/2c261bcf-7bbf-42c4-b299-383de7e3356f/diy_breakfast_nook_plans.pdf
    • https://uploads.strikinglycdn.com/files/316b453e-8a51-4967-a18e-7c81271d67d2/guitar_chords_book_for_beginners.pdf
    • http://wikilupari.epizy.com/50564583714.pdf
    • https://s3.amazonaws.com/bededuxotulapil/14575678617.pdf
    • http://nabulegewuwal.myartsonline.com/gestores_de_referencias_bibliogrficas.pdf
    • http://tupaputukexoro.epizy.com/koradafurononisakodisede.pdf
    • http://butokerisutu.epizy.com/how_to_connect_bose_remote_to_lg_tv.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c0a.bin
3b6c3edccbbdf68622c80e44ac099bd4bffa00507f4f1bc839f0bdbf087aa810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15C0A 3080 bytes
font_01_sfnt_off00016714.bin
ee391c40a39104c5d5d337bda3d49fc84cfba52e2041b93709c0217876e2f47a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16714 5020 bytes
font_02_sfnt_off00017811.bin
8420c2bd80ec765e183cdcd7b1f957579bab167de632bad37011229f3c566a08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17811 13904 bytes
font_03_sfnt_off0001a583.bin
a1bdc24ec6dc0332449754d26803ee00bb6717469f64a18f47c680e22104396b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A583 16080 bytes
font_04_sfnt_off0001ba39.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA39 4324 bytes

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