Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f402212e426c0e…

MALICIOUS

PDF

75.3 KB Created: 2021-03-16 05:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05c56e95f239983e1f6f4f8739c4cdcb SHA-1: 9935c7658a8ab97951f5733049cef3360d2f4d04 SHA-256: 70f402212e426c0e273472bc8bcae50b766b7176b38cbbfe6661c0c547ac9bbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to Weebly and other free hosting services, suggesting a link farm or redirection mechanism to host malicious content. The document body, though heavily obfuscated, references "Worksheetworks.com answer key coordinate picture", a common lure for educational phishing scams. No scripts were extracted, but the extensive use of external URLs points to a download or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://golowaki.ru/wix?keyword=worksheetworks.com+answer+key+coordinate+picture
    • https://benodamefeju.weebly.com/uploads/1/3/5/3/135346815/4883315.pdf
    • http://vomimaforotagi.mywebcommunity.org/94935932451.pdf
    • http://giwosesupalu.medianewsonline.com/b_l_theraja_basic_electronics_download.pdf
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/pesodepaguvamozu.pdf
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/55046fa9.pdf
    • https://mizijuwewis.weebly.com/uploads/1/3/4/3/134392366/jumumo.pdf
    • https://tuledekubixa.weebly.com/uploads/1/3/4/7/134722649/3fc269f7.pdf
    • https://static.s123-cdn-static.com/uploads/4410013/normal_600048037d50e.pdf
    • https://seruvukajobal.weebly.com/uploads/1/3/4/4/134479042/filebe.pdf
    • https://jatazuleb.weebly.com/uploads/1/3/4/6/134662889/3450516.pdf
    • https://cdn-cms.f-static.net/uploads/4382412/normal_601b7152027af.pdf
    • https://ninibukakogim.weebly.com/uploads/1/3/2/8/132815385/1007897.pdf
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/6a548707c49fe8b.pdf
    • http://zodatowafe.getenjoyment.net/57632404563.pdf
    • http://tufuwavaziga.mygamesonline.org/witiroku.pdf
    • https://gitinegu.weebly.com/uploads/1/3/4/6/134648864/soxugegupub.pdf
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/2ce82d98ff.pdf
    • https://xezitolisaja.weebly.com/uploads/1/3/1/4/131406502/7ff9dc84faf0.pdf
    • https://static.s123-cdn-static.com/uploads/4370309/normal_5fe0d55f93167.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fovezewi/roruxuxurebirifiwifesin.pdf
    • https://s3.amazonaws.com/wizidimawag/19987912835.pdf
    • http://totuxivez.onlinewebshop.net/peg_perego_toy_car_john_deere_gator_xuv_green_igod0063.pdf
    • https://s3.amazonaws.com/levovod/74055109443.pdf
    • https://s3.amazonaws.com/firudegix/akbar_saleem_anarkali_telugu_movie_songs.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcde.bin
e25c833d4bdbff5b215674b185bb1f904e252e02dc3190023ba1aaa8eb8c8db6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDE 5464 bytes
font_01_sfnt_off0000ef6f.bin
0db7269b7be5989bfa578db4bcdd9763390645b0dd6bed5ebb1f86298127df43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 9940 bytes
font_02_sfnt_off0001117d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1117D 4324 bytes

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