Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05455125370aadb…

MALICIOUS

PDF

101.5 KB Created: 2021-07-27 19:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bae15104051fcb5a6ca4379f85bcf2a4 SHA-1: e1332118e6556aa11d086a14c957405d116f0c04 SHA-256: f05455125370aadbe338b372075ac14fae61831ec2c61c7070b66a648e5d4835
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of an advance-fee scam. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to distribute or host malicious content. The primary attack pattern involves luring the user with promises of a prize or delivery, likely leading to a download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://alarcon-v.com/editor_upload_image/file/wezufawewo.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6348fbe5d5---ketemodelilotadijijufosur.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16098aeb3341bf---vukewadevibenewirak.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07e55b2772---74618886809.pdf
    • http://dejede.com/userfiles/file/xasaxusa.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a28ac8902d---xiwulugikojog.pdf
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/68960151549.pdf
    • http://dintainoodle.com/uploads/files/gomawisig.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0880b61f2e---xepipisavanemivusoriwat.pdf
    • http://eprdel.cz/userfiles/file/bipadubuzufod.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16090e4476c6b0---zurezobigefakezosuju.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608572baebec8---91903008830.pdf
    • http://cuacuontoanthang.com/media/file/83273678025.pdf
    • http://carlaschroyen.com/content_docs/zizawogarimawajonadi.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160812ee28c2d7---15295577631.pdf
    • https://jasmijnbloemengroen.nl/userfiles/file/2964155443.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/9f6dff8f73df21260c36bb0b10ec77a4/68330650000.pdf
    • http://studiolaviano.it/userfiles/files/76092829779.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/9v8s7rgf4ofap3890gqfjcmmtu/ranezom.pdf
    • https://kientrucqhouse.com/uploads/image/files/jerutizupu.pdf
    • http://ahcxdq.com/uploads/file/062029504567.pdf
    • http://safaraval.com/basefile/safaravalcom/files/23393394962.pdf
    • https://dienlanhbachkhoa.info/upload/files/4869065777.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=anime+battle+3.5+unblocked+66
    • http://e1pl2.nazwa.pl/busy/fotki/file/89808382885.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ac0.bin
d9a2c86f2953dd8d09eca1c29dd0ec8310c96df4c4cdb28b826e1c953d7c87ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC0 17792 bytes
font_01_sfnt_off000149b9.bin
62ad60f0337225e3a403ed5540cfbc4f72beb44c9533d03b21eea13433b82696
pdf-font-stream PDF embedded font (sfnt) at offset 0x149B9 2964 bytes
font_02_sfnt_off000155d8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x155D8 16792 bytes
font_03_sfnt_off00016def.bin
98da60d6b958fb432e4a428608eb5c0336a3721a7b86b651997bb75d5b55cf05
pdf-font-stream PDF embedded font (sfnt) at offset 0x16DEF 11116 bytes