Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56470f0bf90877f…

MALICIOUS

PDF

33.5 KB Created: 2020-03-30 14:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ec7fad6c93896edced389f4abb13e8dc SHA-1: 1fc6775e60823a139fbaf7f31e886b2a954c5eb6 SHA-256: a56470f0bf90877fd8f7e3d2b61390ad268e1b1b7bcd6380393d7483b71259b7
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, indicating a link farm or SEO spamming operation. The primary URL points to a page that appears to be related to a leaf blower carburetor, likely a lure. The ML classifier strongly flagged this PDF as malicious. The presence of numerous unknown-reputation URLs suggests a malicious intent to redirect 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://bailigongyulechengshoujiban.br3h.com/uploads/1/3/0/5/130551298/130551298.html#poulan+pro+leaf+blower+bvm200vs+carburetor
    • http://bestofthewestmoving.com/uploads/1/3/0/7/130740080/690818.pdf
    • http://lkniche.com/uploads/1/3/0/7/130738871/751734.pdf
    • http://semabwa.com/uploads/1/3/0/2/130270898/7050964.pdf
    • http://8880evergreen.com/uploads/1/3/0/2/130288498/5b83dde4613.pdf
    • http://rideandtrain.com/uploads/1/3/1/1/131164474/125362.pdf
    • http://arianapills.com/uploads/1/3/1/3/131380347/7563990.pdf
    • http://lwoodsllc.com/uploads/1/3/0/6/130605074/zimopemifovelak.pdf
    • http://andremessina.com/uploads/1/3/0/5/130551597/0d690f9526b40.pdf
    • http://dynamicdietitianspreview.com/uploads/1/3/0/7/130776252/3408252.pdf
    • http://hks-haveservice.dk/uploads/1/3/0/7/130776590/39d31.pdf
    • http://brookesaltus.com/uploads/1/3/1/1/131164261/rebisovojugapof.pdf
    • http://foxholediesel.com/uploads/1/3/0/4/130489833/towazulevafovumigam.pdf
    • http://snapshotsfromhell.com/uploads/1/3/0/2/130272414/bb0f1aa0c0a.pdf
    • http://o2smallhouses.com/uploads/1/3/0/6/130621720/wowib_jewejodezidum_zadorugex_pitudogawirerag.pdf
    • http://mazeservices.com/uploads/1/3/0/7/130776267/vabakedupivop.pdf
    • http://silvervigor.com/uploads/1/3/0/6/130620389/fukig.pdf
    • http://shananigansonline.com/uploads/1/3/0/5/130590291/febutelularekaviso.pdf
    • http://kg5aen.net/uploads/1/3/1/4/131408618/najexek_lurukuxe_teseloxoloxev.pdf
    • http://channelreader.com/uploads/1/3/0/4/130435988/f74aad8.pdf
    • http://stiringtheshit.com/uploads/1/3/0/6/130620282/nibopemilupavajo.pdf
    • http://thetomcatsband.com/uploads/1/3/0/7/130775475/0d807.pdf
    • http://lifestylebeautysupply.net/uploads/1/3/0/5/130551611/xogela.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d79.bin
f65670c765405552a9df7e56b9f02e4c0909f6bdcf68057019cc975b8ac7463c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D79 6676 bytes

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