Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ec615f9c6e6774…

MALICIOUS

PDF

47.2 KB Created: 2020-03-29 23:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 28e8568f7a903e2960327f93e0b48fc8 SHA-1: f1bba7d76955a3a8058c1cf8a2f29f9151788c14 SHA-256: b2ec615f9c6e6774e404855451c4a0510796170867a15c511500240e5c9ee4d7
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains, forming a link farm. The document body is heavily obfuscated but contains a URL that appears to be the primary lure. This behavior is indicative of a malicious document designed to redirect users to potentially harmful content or further stages of an attack.

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://74-123-76-48.mgwnet.com/uploads/1/3/0/2/130289406/130289406.html#c%C3%B3mo+se+dice+arqueo+de+caja+en+ingl%C3%A9s
    • http://watchill.net/uploads/1/3/0/6/130604441/bikajuwaj.pdf
    • http://great-wall.online/uploads/1/3/0/2/130289493/selabufonurokeloxe.pdf
    • http://ceramicprocincinnati.com/uploads/1/3/0/9/130969470/segaxe.pdf
    • http://x2notcovers.com/uploads/1/3/0/2/130272850/gijudebotewejamowav.pdf
    • http://12x-hybridmuscle.com/uploads/1/3/1/3/131379801/2782573.pdf
    • http://jocilynsjourneytowellness.com/uploads/1/3/0/7/130740206/midovepaki_domobuvonewa_zenaf.pdf
    • http://zhzhgao.com/uploads/1/3/1/1/131164109/zuvefovo_fofevokapuk_xasej.pdf
    • http://lovesmotion.net/uploads/1/3/0/3/130313006/e35ce60778.pdf
    • http://philkincheloeplumbing.com/uploads/1/3/0/7/130738778/05fd63049d784.pdf
    • http://nationalcatholicchoir.org/uploads/1/3/0/6/130621093/seziduwixumaw-tawunidubido-jebakuwubunem-pijexiwe.pdf
    • http://gratitudeandglitter.com/uploads/1/3/1/0/131070849/7231550.pdf
    • http://cprtrainingkc.com/uploads/1/3/0/4/130483270/5942006.pdf
    • http://oproservices.com/uploads/1/3/0/5/130551898/mepat-gadosi-fezagapov-dituwur.pdf
    • http://dbsarah.com/uploads/1/3/0/8/130813461/purevagapit.pdf
    • http://amoshummus.com/uploads/1/3/0/4/130488157/5921524.pdf
    • http://replenishmysoul.com/uploads/1/3/0/5/130542936/a5a16.pdf
    • http://simbachile.com/uploads/1/3/0/4/130476821/pofasoful-kemuw-wibazodul-gimogemuwanuso.pdf
    • http://aleksconst.com/uploads/1/3/0/5/130590308/9572.pdf
    • http://h-u-c.com/uploads/1/3/0/5/130539457/63553.pdf
    • http://uwsc.net/uploads/1/3/0/7/130739711/1300000.pdf
    • http://ninjagoartoftheninja.com/uploads/1/3/0/4/130476270/roromilomo.pdf
    • http://kdchristiannoveltiesservices.com/uploads/1/3/0/6/130604863/rofobotarir.pdf
    • http://eb-purchasing.com/uploads/1/3/0/4/130483474/girat.pdf
    • http://katyvidler.com/uploads/1/3/0/6/130605001/7450076.pdf
    • http://katyvidler.com/uploads/1/3/0/6
    • 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_off00008049.bin
b7199f3ea7acc02135c023930c91bc8ac50e47a5fb729f86574cc48fc3aa10db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8049 8316 bytes
font_01_sfnt_off00009ee7.bin
59d8a097129a595d6828513bcc5b4d47c00a7c4de9545a43efee4f2c176228e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE7 4288 bytes

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