Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69aa8fadefd87d7…

MALICIOUS

PDF

98.8 KB Created: 2020-03-08 00:01:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e1f4d028ad99ff1ffd331aab32243f2a SHA-1: b7bbaf06bf90855d68929d7ca4c9baa545f57ff6 SHA-256: f69aa8fadefd87d7f87e94071df1617811026a53ddf9de5db1ac4ac1a99f582b
96 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which are dynamically generated and point to various domains. The document body, though partially corrupted, includes a URL related to 'airtel dth yearly recharge plans', suggesting a lure to attract user clicks. The primary attack pattern involves directing users to a link farm of potentially malicious websites.

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://shack63.pleasingfood.com/uploads/1/3/0/5/130590157/130590157.html#airtel+dth+yearly+recharge+plans+in+mp
    • http://fullonbeauty.com/uploads/1/3/0/6/130621527/jafoxipipolukax-repubonotot.pdf
    • http://medicinereturn.net/uploads/1/3/0/2/130289480/dugogileb_xefimekamaxuzi_sejebaxiruboze_beriwurifepez.pdf
    • http://mouthandmuscle.net/uploads/1/3/0/2/130289736/zaxizagomiwo_vebiroma.pdf
    • http://andersonmobilehomepark.com/uploads/1/3/0/2/130288720/lilizubenejovire.pdf
    • http://megan-noel.com/uploads/1/3/0/4/130476273/sefabuwatab.pdf
    • http://lisawynnepersonalshopper.com/uploads/1/3/0/8/130813447/3e37b1f80851137.pdf
    • http://adapt-life.com/uploads/1/3/0/4/130435955/boxusoguputuma-towirixig-fagugem.pdf
    • http://puissancee.fr/uploads/1/3/0/4/130488736/xakuguwelokobavoxori.pdf
    • http://mta-sts.carindalewritersgroup.org/uploads/1/3/0/5/130544725/kisuwenev_zopebopab_botudegak.pdf
    • http://laurensoniatdesigns.com/uploads/1/3/0/6/130621046/9951489.pdf
    • http://www.ultimatestriperguideservice.com/uploads/1/3/0/8/130874371/wunifopojesokur_karopevu_pipapuka.pdf
    • http://cassieorduno.com/uploads/1/3/0/4/130436289/ec1fbb7f4b58482.pdf
    • http://www.junglecapital.com.au/uploads/1/3/0/8/130814830/roromevi-kezowo-dafugikerek.pdf
    • http://riyababyfood.com/uploads/1/3/0/5/130550915/9444174.pdf
    • http://amiture2master.com/uploads/1/3/0/5/130588345/393e1d13.pdf
    • http://cestpaspourtoutlemonde.com/uploads/1/3/0/3/130313470/6403434.pdf
    • http://eastwoodflooringnantucket.com/uploads/1/3/0/3/130312974/wefajadan.pdf
    • http://gabbiadelcazzo.com/uploads/1/3/0/4/130476266/4089926.pdf
    • http://tntflooringllc.com/uploads/1/3/0/4/130488975/8566738.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014705.bin
6cf61b29882df8dca155e1a9953d252c3bc392fba9d15a0ade4841bf109367a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14705 8264 bytes
font_01_sfnt_off000166d4.bin
32b54217619f9438721b423dc2f4f4da0f78781b0811ea49af2be6b0310ecf56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x166D4 16164 bytes

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