Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35f6fe43b121ab5…

MALICIOUS

PDF

45.5 KB Created: 2020-03-08 10:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1b93f352fc439dddfa00e7c8d62f13c4 SHA-1: e28d001df1ce6204a890791c0fa609ff658066ef SHA-256: d35f6fe43b121ab545827c884ba27fe3b822d0cca222382a65748a3495433258
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to URLs that are also present in the heuristics and URL extraction. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://74-123-75-227.mgwnet.com/uploads/1/3/0/2/130270775/130270775.html#flames+of+war+open+fire+ebay
    • http://miraclevalleyceylon.com/uploads/1/3/0/5/130540009/6840024.pdf
    • http://www.safegaps.solutions/uploads/1/3/0/7/130775778/rixujajedukure.pdf
    • http://www.losgatosswingband.org/uploads/1/3/0/7/130775838/dagifuv.pdf
    • http://mydivineinspirations7.store/uploads/1/3/0/6/130640132/fc301e4b9d1385.pdf
    • http://www.septemberfashionmag.com/uploads/1/3/0/8/130874458/5d9b7f0f26cda.pdf
    • http://www.californians-care.net/uploads/1/3/0/2/130289595/detif-dapono-devufatiken-titotatuxob.pdf
    • http://vibecbdtest.com/uploads/1/3/0/6/130621772/5350507.pdf
    • http://penwoodcustomcabinetry.com/uploads/1/3/1/0/131071256/8932337.pdf
    • http://mail.justbinnovative.com/uploads/1/3/0/6/130604918/wivosebanaz-kamiv.pdf
    • http://ndcca2016.com/uploads/1/3/0/4/130435842/tozivixosemo.pdf
    • http://www.course-group.com/uploads/1/3/0/3/130313086/5110731.pdf
    • http://www.suntnenorocit245.com/uploads/1/3/0/6/130621614/buxabixeralonibukixa.pdf
    • http://alternative-healing-therapy.com/uploads/1/3/0/6/130620869/mobupemoset_suxefetiwinab_putisovidajulo_berijibupik.pdf
    • http://happybeautifulnaked.org/uploads/1/3/0/5/130589000/943ed1.pdf
    • http://millennialwomen.net/uploads/1/3/0/2/130289592/5675702.pdf
    • http://jeeltransformandoproyectos.org/uploads/1/3/0/8/130873863/rijasesilov_solusekajet_zexenevum_zamug.pdf
    • http://gaymer.tv/uploads/1/3/0/7/130739192/dirig.pdf
    • http://jjbeef.com/uploads/1/3/0/6/130621450/kilitoxurutafuj.pdf
    • http://sarinabenn.com/uploads/1/3/0/4/130477533/fuvekiwuraw-galenuriduwat-tuxirijugimed-jejoludeko.pdf
    • http://amplivation.com/uploads/1/3/0/8/130814397/5533305.pdf
    • http://missamberlilly.net/uploads/1/3/0/5/130550794/29b37f0360b.pdf
    • http://ameliaalexandra.com/uploads/1/3/0/5/130550993/novodobetorez-xujotid-pijivenog-visixezuzujuzo.pdf
    • http://mattjenningsband.com/uploads/1/3/0/6/130640097/jakeduxeladekebu.pdf
    • http://o2oking.co/uploads/1/3/0/7/130740536/8862877.pdf
    • http://woodworkershop.us/uploads/1/3/0/4/130488779/zaned-dadabe.pdf
    • http://ameliaalexandra.com/uploads/1/3/0/5/130550993/novodobetorez-xujotid-pijivenog-visixezuzu
    • 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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007047.bin
ddb34d814ff262b5da4803a6c82eae1d0656a5a51c90ac3ff1b2e3a4179a8c4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7047 9452 bytes
font_01_sfnt_off00009339.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9339 16036 bytes

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