Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0dc0519410e61ff…

MALICIOUS

PDF

82.4 KB Created: 2021-07-21 19:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 33bc69af7f183b059b611e5df17860de SHA-1: 5a3f4740018ed1100933b686afc0e529a4a8cba1 SHA-256: d0dc0519410e61ffa566a8cbe69b97807650df80cad2584f5ddfd19d3ab61558
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings suggest the document uses an image lure to redirect users to an external URL, likely for phishing or malware distribution. No scripts were extracted from this sample, but the presence of embedded URLs and the nature of the heuristics point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://feedproxy.google.com/~r/sq/ugae/~3/u8n3KCQdUYc/square?utm_term=cost+of+living+in+cotonou PDF link annotation
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f6d484f1dc882c9dfa6cdc/1626788996793/fexoworuxeti.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec784b5c244202458a501d/1626110027741/zefudoziruzepaxedorapitol.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f1f8fabb001e09f08535d7/1626470650646/cp30_batching_plant_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0348fd9659e278648b6e2/1626354831861/aggress_in_a_sentence.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f60f7e0d6c883fd62f41d3/1626738558487/14187221613.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edb5d793ea6d7f6ef8557b/1626191319256/workaholics_trainees_day.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edaad47d02012a363344f4/1626188500431/paturusozojanekev.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e951975fa2eb14b90d4588/1625903512212/tamilrockers_2019_movies_download_in_tamil.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f258aebb7e64222dee4bfc/1626495150346/kuduxubupafumifize.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f704b26b4f0873c1565368/1626801330150/vibarijafemin.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f5a5cc268fab0ca989448f/1626711500976/copying_someone_elses_work.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2ee976d5e991e36dad60c/1626533528094/kafunolejewowefibu.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8d21a22fa7e06344cce5f/1625870875093/all_the_light_we_cannot.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f2a1334f27972c6039036d/1626513715743/20285594422.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8ce77d354a5e86a37198/1626115303463/train_sim_world_ps4_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f7b0347fa2f330f683e9b9/1626845236300/94110840793.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f18c69d2e52e1c2af2e23f/1626442858102/20621369574.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f6f030eee8cf77de93f7fd/1626796080361/77154470237.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f644525f306a537f780fd1/1626752082966/cal_poly_grad_school_acceptance_rate.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e936f5b9b95949b65f72d4/1625896693255/diary_of_a_madman_and_other_stories_lu_xun.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f55bdbb84a576e6c17a62e/1626692571617/do_snowy_egrets_migrate.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f5ded6eda55f25f70883ae/1626726102638/federal_whistleblower_act.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f3bde76167905317df6ea9/1626586599308/68216393292.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE162 10316 bytes
SHA-256: e26835f0270c65fb43383c57d53cc192a64207111327fe12fee02ea0f6775eda
font_01_sfnt_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E2 16788 bytes
SHA-256: ed004fb690b45a5243f20705f3556c76981ca3df925e9fb9bd03f23a8a978a94

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